HUBBELL ShopTalk™ 2011
Workplace Safety Seminar
Safety First with Hubbell
Safety First with Hubbell
• A safe work place can help reduce costly
accidents and downtime
• Hazards exist in every workplace
• Hubbell products are designed to help
maintain a safe work place
• Hubbell is a recognized industry leader
on code and regulation
OSHA Safety Topics
The following were the top 10 most frequently cited standards in fiscal year 2008*
1. Electrical Grounding
2. Ground Fault Protection
3. Strain Relief for Cords
4. Listed, Labeled, or Certified Equipment
5. Worn and Frayed Electrical Cables
6. Ground Fault Circuit Interrupters
7. Covers for Pull Boxes, Junction Boxes, Fittings, and Outlet Boxes
8. Electrical Equipment Fire Hazards
9. Guarding/Protecting Temporary Wiring Over 600 Volts
10. Access to Installations over 600 Volts
*October 1, 2007 through September 30, 2008
OSHA Safety Topics
The following were the top 10 most frequently cited standards in fiscal year 2010*
1. Scaffolding, general requirements, construction (29 CFR 1926.451)
2. Fall protection, construction (29 CFR 1926.501)
3. Hazard communication standard, general industry
(29 CFR 1910.1200)
4. Ladders, construction (29 CFR 1926.1053)
5. Respiratory protection, general industry (29 CFR 1910.134)
6. Control of hazardous energy (lockout/tagout), general industry (29 CFR 1910.147] (#4 in Fines)
7. Electrical, wiring methods, components and equipment, general industry (29 CFR 1910.305)
8. Powered industrial trucks, general industry (29 CFR 1910.178)
9. Electrical systems design, general requirements, general industry (29 CFR 1910.303) (#2 In Fines)
10.Machines, general requirements, general industry
(29 CFR 1910.212)
*October 1, 2009 through September 30, 2010
UL - Underwriters’ Laboratories
•A not-for profit corporation, operating as a testing facility and a developer of
safety standards – not quality standards.
•No Criteria established to differentiate terms of : Spec-Grade, Commercial,
Industrial, heavy-duty, hard use.
NEMA® National Electrical
Manufacturers Association
A standard of the National Electrical Manufacturers Association defines a
product, process, or procedure with reference to one or more of the following:
•Nomenclature
•Composition
•Construction
•Dimensions
•Tolerances
•Safety
•Operating characteristics
•Performance
•Ratings
•Testing
•The service for which it is designed
•Defines configurations to prevent intermatability of voltages and amperages
•General standards promote interchangeability between products of manufacturers
with like product.
•Standards related to product performance may be formulated by NEMA but are the
exception, not the rule.
Watertight vs. Weatherproof
UL certifies that a product has been tested and meets the NEMA requirements.
NEMA listings are self-certified by the manufacturer. i.e. UL 4X vs. NEMA 4X
Wet & Damp Locations
Watertight vs. Weatherproof
UL 4X
NEMA 4X
NEMA 3R
Weather Resistant Receptacles
All 15 and 20 amp, 125 and 250 volt non-locking
receptacles shall be listed as weather resistant type
per NEC® Article 406.8, Receptacles in Damp and Wet
Locations.
• Receptacles installed outdoors and other wet /damp locations
are subject to demanding temperature variations, direct
sunlight and unusual mechanical abuse than those in a typical
dry environments.
• Weatherproof covers do not offer complete environmental
protection.
• Weather resistance increases corrosion resistance, cold
impact,
resistance to ultraviolet and water exposure and
effects of aging.
• Damp locations include receptacles installed outdoors and
locations requiring a weatherproof enclosure.
• Listed devices are required to have a “WR” marking on the
face visible when installed.
Corrosion Resistant Devices
Marine Grade Devices
• Nickel plated brass blades, contact
• Stainless steel body assembly screws
• UL Listed, CSA Certified UL 498
• NEMA 1, 4, 4X, 6, 6P environmental
ratings
• UL listed and CSA certified
Watertight Devices
•TPE (Rubber) molded body
• Nickel plated brass blades, contact
• Stainless steel body assembly screws
• UL Listed, CSA Certified UL 498
• Rated NEMA 3R, 4, 4X, 6, 6P
• Rain tested
• Hose-down tested
• Submersion tested in 6ft of water for 24 hrs
Isolated Ground Receptacles
• Ground terminal has insulating
barrier from mounting strap
• Work box must be grounded to
electrical system to clear faults
• Single ground path vs. redundant
path of bonded box can pose a
safety hazard
• Triangle Identification
SNAPConnect®
Duplex Receptacles
•No exposed live terminals
on receptacle
•Pigtails are finger safe if
circuit is energized
•Clear terminal housing
for inspection of power
contacts
Receptacle Strap Composition
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Ground Straps
Ground wire attachment point
All brass
Nickel coated brass
Brass contacts on steel straps
Use in corrosive environment
Receptacle Orientation
Ground up or down?
What is wrong with this picture?
Tamper Resistant Devices
• 406.1 amper
T
Resistant Receptacles in
Dwelling Units.
In all areas specified in 210.52, all 125 volt, 15-and 20-ampere
receptacles shall be listed tamper resistant receptacles
 It is estimated that 2,400 children are injured annually by electrical
outlet related incidents.
 Tamper Resistant receptacles incorporate internal mechanisms to limit
access to energized internal components.
 Dwelling units are a single unit, providing complete and independent
living facilities for one or more persons, including permanent
provisions for living, sleeping cooking and sanitation.
 The new requirement applies to all dwelling unit outlets.
 Listed devices are required to have a “TR” marking visible when
installed without the cover plate.
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How TR Receptacles Work
TR receptacles contain spring-loaded shutters that will
lock out a single object, such as a hair pin or a key,
effectively blocking the contacts. A plug, whether it is
two prong or 3 prong will align the shutters and allow
contact.
Safety Grade Devices
•Complies with 1993 NEC
Article 517-18c
•Electrically safe vs.
mechanically safe – reciprocal
contact energizing system
•No exposed terminal screws if
wall plate is removed
NEMA Chart
•Prevent intermatability of
voltages and amperages 15a-30a,
125v – 600v
•50amp – CS California Standard
configurations
NEMA vs. Non-NEMA
Dual Voltage Rated Devices
• Correct terminating
• Identical configuration
• Dual voltage 125/250v AC
• Poles / Wires
Safety-Shroud® Twist-Lock®
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Protects against inadvertent contact
with blades during mating
Reduces exposure to arcing when
connecting or disconnecting under
load
Protects blades from damage
Provides mechanical support for
plug and cable drag removing stress
from power contacts
Pad lockable keyway
Provides additional locking stability
Shroud can be added to old or new
style Hubbell device
Watertight Safety-Shroud®
Twist-Lock®
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UL 4X, 4 & 12 vs. Type 4x
One-piece high impact body design – no boots
required
One–step integral Neoprene sealing gland
Hubbellock®
•Arcs are snuffed out by spring-loaded
shutter doors when devices are mated
or unmated under load
•Safety is enhanced because access to
live female contacts is restricted by
shutter door
•Prevents “lazy” connection as plug is
rejected by spring door if not properly
engaged and locked.
What is a Ground Fault?
An electrical current normally found on the hot & neutrals
which is shunted undesirably to the ground path.
Some portion of current is “derailed”
Ground Fault Protection
The Ground Fault Circuit Interrupter or GFCI will monitor the circuit’s Hot and
Neutral conductors and constantly measure the outgoing current on the Hot
conductor and compare it to the return current on the Neutral conductor.
If the current is exactly the same, the circuit is OK. If it differs at all, there has been
current faulted to ground or a Ground Fault has occurred.
In the diagram at left the
current delivered (blue) is
more than the current
returned (red). These two
waves will not cancel.
UL Standards for GFCI
• UL 943 - Ground Fault Circuit Interrupters
Class A: People Protection
4 to 6 mA trip level
.025 trip time
Class B: Equipment Protection
20 mA trip level
.025 trip time
• UL 498 - Wiring Devices
GFCI Receptacles
•Comprehensive diagnostics functionally test
both the electronic components and the
mechanical trip mechanism
•Flashing RED led indicated device has lost
capability to provide protection
•Now power at the face if reverse wired
•10kA short circuit current rating
•Industrial models feature AUTOGUARD™
self test feature as well as a GREEN “ON” LED
indication of power
•Available in TR tamper resistant and WR
weather resistant
Testing GFCI Receptacles
• Designed to measure the trip level of
portable or “wired-in” GFCI’s in a range of
2-7mA. Leakage level can be adjusted
from 2-7mA.
• Will measure leakage level in small
portable tools and appliances from 1-7mA.
• Ideal for measuring leakage level of
GFCI breakers,GFCI portables and GFCI
receptacles.
GFCI Receptacles
2011 NEC Code Change
210.8 GFCI Protection
A new requirement addresses the accessibility
of the test and reset functions of GFCI devices.
•210.8 GFCI Protection. Ground-fault circuit
interruption for personnel must be provided as
required in 210.8(A) through (C). The Groundfault circuit-interrupter device must be installed at
a readily accessible location to test on a monthly
basis.
•The Code previously didn’t address the
accessibility of the test and reset functions of
GFCI devices.
Portable GFCI
GFCI Portable Line Cords
• Open neutral protection
• Sealed electronics in
watertight housing
• Straight blade and TwistLock
• Manual and Auto reset
Safe Portable GFCI Protection
Open Neutral Protection consists of the
opening of both line contacts of a protective
device when either line contact loses power.
As an example, if the input neutral opens
due to a broken conductor or loose plug
connection, the GFCI circuitry would not
receive power, and therefore would not
provide protection. A current path from hot to
ground could exist, under these
circumstances; a person in contact with the
live conductor could receive a shock or a
faulty appliance that has an internal
insulation failure could allow the case to
become energized.
Portable GFCI
Manual Set
•Required the GFCI to be manually set
for use by pressing the reset button
upon plug in and after loss of primary
power (power failure or unplugging the
device).
•After a ground fault condition, the unit
must be reset by pushing the reset
button.
•Ideal for applications where operator
injury might occur if equipment were to
restart after a power failure. i.e. power
drills, saws, lathes, grinders etc.
Portable GFCI
Automatic Set
•Automatically energizes or sets the GFCI
for use upon plug in and after loss of
primary power (power failure or unplugging
the device).
•After a ground fault condition, the unit
must be reset by pushing the reset button.
•Ideal for equipment where temporary
power failure is likely and undesirable. i.e.
Pressure washers, pumps, portable signs
and lighting, engine heaters, etc.
Hardwired GFCI
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Hard Wired Features
Class A 5 milliamp protection
NEMA 4x housing
Available with audible alarm or
120v AC or 12v and 24v DC
signal
Open (lost) neutral relay
Manual and Auto Reset
120v, 240v, 120/240v, 3Ø 250v,
3Ø 120/208v options
What is wrong with this picture?
This metal conduit box is being used in
manner for which it was not designed.
The box is intended to be mounted on a
wall or other stationary object; it was not
designed as a portable outlet box at the
end of an extension cord. This piece of
equipment is not being used in
accordance with the manufacturer's
intended use (violation of OSHA 29
CFR 1910.370(a) - (g) and NEC 1103(b)).
Portable Outlet Boxes
• UL listed as portable outlet
boxes
• Complies with NEC® 110.12
regarding unused cable
openings in metallic boxes
• High impact non- conductive
corrosion resistant box
• Provides 3R protection with
weatherproof cover plates
• Integral bonding strap
GFCI Receptacle in Portable
Use?
Temporary Power
Hubbell Spider® II
Temporary Power Boxes
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UL 1640 listed for portable power
distribution equipment
Individual GFCI modules with N3-R
gasketed covers
Proprietary Supervisory circuit
Twist-Lock® or straight blade models
Field repairable
Rugged abuse resistant housing
IEC309 H.P. Rated
Pin and Sleeve
NEC Section 430.102(B) requires a separate disconnect means within sight of
motor loads. NEC Section 430.109(F) permits the use of horsepower rated
plugs and receptacles as a “line of sight” disconnecting means. Hubbell’s
horsepower rated plugs and receptacles meet these requirements and are an
approved “line of sight” disconnect means per the NEC 430.109(F).
A motor controller is required in addition to H.P. rated plugs and receptacles
to comply with NEC® Figure 430.1. (Traditional Motor Circuits and
Controllers) NFPA 70E®: When servicing or changing out a plug connected
motor, the motor controller must be turned to the “Off” position and the
switch “Locked Out” per OSHA lock-out/tag-out regulations.
Visual verification of motor de-energization requirements of NFPA
70E are met when the plug is separated from the mating connector.
IEC 60309 H.P. Rated
Pin and Sleeve
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Sequential contacts engagement during mating
and un-mating
IEC configurations specific to each voltage and
amperage to prevent interchangeability of voltages
Watertight 4X Nonmetallic Supertough® nylon
body
Color coded by voltage
Applications
 Waste water
 Welders
 Computer rooms
 Outdoors
 Food processing
Insulgrip® Pin and Sleeve
• UL 1686-C1 configuration standard
• Non-Metallic Insulated housing
reduces the likelihood of electrical
shock during mating and un-mating
• UL Type 4X water tight
• Corrosion and impact resistant
• Interchangeable - Mates with
Crouse-Hinds, Appleton and
Killark devices
Reverse Service Pin and Sleeve
•Finger-safe installation for generators & portable power
•Mechanical interlock to prevent plugging and unplugging while energized
Arc Flash Safety Products
•Mechanically interlocked devices eliminate
breaking circuit under load providing safe
connections to portable equipment
•Hubbell Mechanical Interlock devices serve as
both power source and disconnect
•UL/CSA certified as a manual motor starter and
also suitable as a disconnect
Arc Flash Safety Products
Mechanical Interlocks
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Can not be plugged or unplugged while
receptacle is energized
No exposed “Hot” terminals
UL certified for 4X application
High impact Valox housing
Pin & Sleeve outlet
Provides Lock-out
20, 30, 60 and 100 amp
Fused and Non-Fused
IEC309, UL1686 C1 & Twist-Lock®
Arc Flash Safety Products
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NFPA require equipment enclosures to be
accessed only by qualified personnel
NFPA 70E: Electrical equipment enclosures can
ONLY be accessed by qualified personnel with
extensive protective clothing and equipment,
including fire-resistant suits and hoods with nonconductive wands.
NFPA 79: Electrical Standard for Industrial
Machinery
• ALL utility receptacles must be GFCI protected
• ALL external utility receptacles must be covered
• ALL covers must maintain enclosure rating
Motor Disconnects and
Compliance with NEC® 430
and NFPA 70E®
Motor Controllers
vs. Disconnect Switches
NEC Section 430.102(B) requires each motor controller to have a disconnect within line of sight from
the motor and driven equipment. NEC Section 430.109(A)(6) recognizes that a manual motor
controller and disconnect can be the same unit. Hubbell’s Circuit-Lock® Unfused Disconnect
Switches are UL listed as a manual motor controller and also “suitable as a motor disconnect” and
meet these code requirements. In order to comply with the visual verification requirements of NFPA
70E without the need for PPE and FPB calculations, a H.P. rated plug and connector should be used in
the circuit between the disconnect switch and the motor.
Hubbell H.P. rated IEC pin & sleeve plugs and connectors can be used in conjunction with CircuitLock® Disconnect Switches to provide a visual verification of disconnecting means for servicing or
changing out a plug connected motor.
NFPA 70E®: When servicing or changing out a plug connected motor, the Circuit-Lock Disconnect
switch’s red handle must be turned to the “Off” position and the switch “Locked Out” per OSHA
lock-out/tag-out regulations. Visual verification of motor de-energization requirements of NFPA 70E
are met when the plug is separated from the mating connector. Applications where motors are hard
wired from the disconnect switch will require some level of PPE and FPB calculations.
Circuit-Lock® Motor
Disconnect Switches
Modular Power - Linkosity®
•NEC® Article 670 on Industrial Machinery
refers to NFPA 79-2007, Electrical Standard for
Industrial Machinery where sections 14.1.2.2
and 14.1.5.1 specifically indicate that
molded connections factory-applied to cable
and cords are to be permitted.
•NEC® 336.10(7) Permits type TC-ER cable in
transitions between cable trays and the
utilization equipment or devices when secured
at intervals not more than 6 ft without
continuous support.
•Sealed cable sets prevent condensation
building up in raceway and penetrating the
motor head
MotorQuick™ Disconnect
Switches
MotorQuick™ Disconnect Switches are also UL listed as a manual
motor controller and “suitable as motor disconnect.” When the
switch is turned to the off position, the plug and play technology of
the Linkosity™ power system can enable quick motor replacement.
Motor change out time can be reduced by over 65%, minimizing
production down time. NFPA 70E®: When servicing or changing
out a Linkosity™ connected motor, turn the MotorQuick™
Disconnect switch’s red handle to the “Off” position and “LockOut” per OSHA lock-out/tag out regulations.
Visual verification of motor de-energization requirements of
NFPA 70E® are met when the Linkosity™ plug is separated from
the mating connector.
TredTrak® & TruckTrak®
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Safety blue and yellow for high visibility
TredTrak for pedestrian traffic (10,500 lb
rating)
TruckTrak for vehicular traffic (20,150 lb
rating)
3’ Sections lock together
Safety surface pattern
UV stabilized for outdoor use
Complies with NEC requirements (article
525) for insulating electrical cables for
indoor and outdoor applications
AccessTrak® System
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AccessTrak®
Meets ADA requirements
10,000 lb weight ratingwill
protect cables and hoses up to
1.31” diameter
Expandable by length and width
Cable Management
•UL Listed as type EF conduit
•Meets NEC 356.10 applications
•Non-metallic construction
eliminates fatigue and separation
at fittings
•No metal core prevents potential
energization
Wire Management
• NEC 400.1 Pull at joints
and terminals
• OSHA 29CFR 1926.405
Strain relief, Cords
passing through holes
• NEC 356.10 Liquidtight
Flexible Non-metallic
conduit
55
Cable Management
•Support grips should have a 10 times
the cable weight as a safety factor
•Available in stainless steel for high
corrosive areas
•OSHA Regulation 29 CFR
1926.405(g)(2)(iv) Strain relief.
Flexible cords shall be connected to
devices and fittings so that strain relief
is provided which will prevent pull from
being directly transmitted to joints or
terminal screws.
Cable Management
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NEC® 400.10 (Pull at Joints and
Terminals) Flexible cords and cables
shall be connected to devices and to
fittings so that tension is not transmitted
to joints or terminals.
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OSHA 29CFR 1926.405(g)(2)(v) Cords
passing through holes. Flexible cords
and cables shall be protected by
bushings or fittings where passing
through holes in covers, outlet boxes, or
similar enclosures.
Lockout, Tagout Safety
• Lockout/Tagout procedures
safeguard people from
unexpected startup of machinery
or equipment
• NFPA 70E-2004 LO/TO
procedures 29CFR1910.147 (a)
(3) (i)
• Highly visible OSHA requirement
Lockout, Tagout Safety
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NFPA 70E-2004 LO/TO procedures:
OSHA 29CFR1910.147 (a) (3) (i) This
section requires employers to establish
a program and utilize procedures for
affixing appropriate lockout devices or
tagout devices to energy isolating
devices, and to otherwise disable
machines or equipment to prevent
unexpected energization, start up or
release of stored energy in order to
prevent injury to employees.
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Highly visible OSHA requirement
Hubbell SWITCHOUT®
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SwitchOut®
Designed for toggle
switch lockout
Lighting fixture
M&R
Partially back out
plate screws
Slip on and tighten
screws
Hubbell PLUGOUT®
Plug is closed,
locked and tagged
• Tag identifies
user
• Large size for
welder plugs
• High Impact
plastic
Hubbell Keyed PLUGOUT®
Keyed PlugOut®
• Easy to carry –
fits in pouch or
tool box
• Fits over blade of
2 or 3 wire plug
Circuit-Lock®
Mechanical Interlocks
NEC®: Hubbell’s Circuit-Lock Mechanical Interlocks allow an installation to comply with
NEC Section 430.102(B), requiring each motor controller have a disconnect within line of sight
from the motor and driven equipment. The NEC® also recognizes that a manual motor
controller and disconnect can be the same unit [NEC Section 430.109(A)(6)]. Hubbell’s
Circuit-Lock® mechanical interlocks are designed to comply with both the manual motor
controller and disconnect requirements of the NEC®. In addition, Hubbell Mechanical
Interlocks provide an extra measure of safety by preventing a plug connected motor load from
being disconnected or connected live or under load. NFPA 70E®: When servicing or changing
out a plug connected motor, the mechanical interlock’s combination motor
controller/disconnect switch red handle must be turned to the “Off” position and the switch
“Locked Out” per OSHA lock-out/tag-out regulations.
Visual verification of motor de-energization requirements of NFPA 70E are met when the
plug is separated from the mechanical interlock.
Explanation of UL Standard
Changes
New UL Requirements for GFCI Cord Reels
(Defined in UL 355 Standard for Cord Reels)
 Paragraph 1.5 – Cord Reels shall be permitted to employ
Ground-Fault Circuit-interrupter(s) (GFCI) outlet(s). The Ground
Fault Circuit Interrupters (GFCI) shall be investigated to the
requirements in the Standard for Ground-Fault Circuit
Interrupters, UL 943.
 Paragraphs 4.3, 4.4 – Cord Reels, that employ Ground-Fault
Circuit Interrupter outlet(s) and are connected to the power supply
by means of flexible cord with an attachment plug and/or that
employ slip rings, shall be provided with open neutral protection
as part of the GFCI.
 Definition Paragraph 2.7.1 - Open Neutral Protection consists of
the opening of the line contacts of a protective device when either
line contact loses power. As an example, if the input neutral
opens due to a broken conductor or loose plug connection, the
protective device circuitry would not receive power, and therefore
would not operate to provide protection. A current path from line
to ground could exist, under these circumstances; a person in
contact with the live conductor could receive a shock. (A faulty
appliance that has an internal insulation failure could allow the
case to become energized.)
Cable Management
•Cable reels help eliminate
unmanaged cords that would
cause a trip hazard.
•Types include UL type 4X
weatherproof, industrial,
commercial, static discharge
and air and water hose reels
SPD Surge Protection Devices
SCCR Ratings
•The NEC 2002 Code change states, “The TVSS shall be
marked with a short circuit current rating (SCCR) and shall
not be installed at a point on the system where the
available fault current is in excess of that rating.”
•The SCCR rating is the capacity of current with which the
tested Surge Protected Device can withstand at the
terminals where connected, without breaching the
enclosure in any way. This change in the UL requirements
is in response to NFPA (National Fire Protection Agency)
70, Article 285.6 of the 2002 National Electrical Code.
•U.L. 1449-23 = Trace Fuse, Thermal Fuse and
Overcurrent protection
SPD Surge Protection Devices
- UL 1449 3rd Edition
• Effective September 29, 2009
• Name Change to Surge Protective Device
• Type 1,2,3,4 defining installation locations
in a facility
• Nominal Discharge Current: I(n)
• New product testing requirements
SPD Surge Protection Devices
Where does the Voltage and Current Go?
•Current will flow through the
path of least resistance. Simply
put, the SPD becomes the path
of least resistance and shunts
the damaging energy before it is
forced through the down stream
equipment
•Good grounding is critical for all
SPD to function properly as
spikes are shunted to ground
SPD UL Type Classifications
L
1
SPD
2
SPD
SPD
Distribution
Permanently
Connected
Branch
Permanently
Connected
3
Loa
d
N
Service Entrance
Line Side of OCPD
Load Side of OCPD
Point of UsePlug-in protection
Additional HubbellSafe Resources
Website Landing Page
Safety Application
Guide
Safety Evaluation
E-learning Course
Video-Demo
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