UL Question Corner
Does UL List the spiral-shaped compact
fluorescent lamps (e.g. light bulbs)?
Does UL List the spiralshaped compact fluorescent lamps (e.g. light
bulbs)? Can they be
used in any type of light fixture
including recessed-type incandescent fixtures?
UL does List the spiral
shaped types of compact
fluorescent lamps (CFLs)
that are very popular right now.
These types of lamps consist of
a self-contained fluorescent tube
and ballast in an enclosure with a
medium base screw shell adapter
that will screw into any medium
base lamp holder. This category
also covers self-ballasted lamps
employing light emitting diode
(LED) lights. These products are
Listed under the product category
Lamps, Self-Ballasted and Lamp
Adapters, (OOLR) located on page
169 of the 2006 UL White Book or
online at www.ul.com/database and
entering OOLR in the Category
Code Search.
This category covers fluorescent
self-ballasted lamps that incorporate a non-replaceable light source
and lamp adapters for use with a
replaceable light source, for installation in Edison base lamp holders in incandescent luminaires and
portable lamps operating at 120 V
60 Hz nominal.
This category also covers selfballasted lamps and lamp adapters
intended for installation in other
ANSI base type lamp holders for operation on other voltages as marked
on the product.
Products with fluorescent lamps
in this category are provided with
integral protection that prevents
overheating and which meets the
requirements of Underwriters Laboratories Inc. for Class P fluorescent
lamp ballasts.
Products are marked to indicate
the environmental conditions for
which they have been evaluated:
dry, damp or wet locations.
Unless evaluated for use in totally enclosed recessed luminaires
or for use with a dimmer, these
products are required to be marked
“Not for use in totally enclosed recessed fixtures,” and “Not for use
with dimmers.”
The wattage rating on compact
fluorescent lamps is typically much
less than the incandescent lamp they
are replacing. A compact fluorescent
98 IAEI NEWS May.June 2007
lamp rated 13 watts emits the
equivalent light output of a 60watt incandescent lamp and a 42watt compact fluorescent has the
equivalent output of a 150-watt
incandescent lamp with a fraction of the heat that is generated
from the incandescent lamps.
As long as the wattage on
the compact fluorescent lamp
is equal to or less than the relamping marking on the luminaire that the lamp is going
into, then the compact fluorescent lamp can be used in the
luminaire, provided all the
markings on the compact fluorescent lamp are complied with.
Compact fluorescent lamps run
much cooler than incandescent
lamps and do not present a heat
issue with recessed luminaires.
These products are not intended
for use in emergency lighting equipment or exit fixtures.
Are all split bolt clamps
Listed to be used for connecting copper grounding
electrode conductors to steel
rebar direct buried in earth, and if
so how can these clamps be identified? Have they been investigated to
ensure there are no electrolysis problems related to the dissimilar metals
involved?
Typical split bolt connectors
are not Listed for connection
of a grounding electrode
conductor to rebar, they are intended for connection of two conductors
in an ordinary dry location inside
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UL Question Corner
an enclosure and are Listed under the category Wire Connectors,
(ZMVV) located on page 307 in
the 2006 UL White book or online
at www.ul.com/database and entering ZMVV at the Category Code
Search. These type of split bolts connectors are not intended to be used
for grounding applications to connect a grounding electrode conductor to rebar or any other component
of the grounding electrode system.
The Listing Mark on the connector
or packaging would identify it as a
wire connector.
Split bolt connectors evaluated
for grounding applications as well as
other types of grounding clamps are
Listed under the product category
Grounding and Bonding Equipment,
(KDER) located on page 122 in the
2006 UL White Book or online at
www.ul.com/database and entering
KDER at the Category Code Search.
As part of the Listing evaluation of a
grounding or bonding device, they
are required to be constructed of a
metal or metals that, when the device
is installed under conditions of actual
service and exposed to moisture, will
not be likely to be adversely affected
by electrolysis.
Clamps Listed under Grounding
and Bonding Equipment (KDER)
are evaluated for compliance with The
Standard for Grounding and Bonding
Equipment, UL 467. A grounding or
bonding device marked as acceptable
for burial in earth or embedment in
concrete shall be provided with all
screws necessary for assembly or connection of the device, and shall be
constructed of copper or a copper alloy containing not less than 80 percent
copper, or stainless steel.
Grounding-type split bolt clamps
or connectors Listed for use with rebar
will be marked on the connector or a
tag on the connector identifying the
size range of the rebar and conductor
size the device was Listed for use with.
In addition, connectors Listed for direct burial in earth or encased in concrete are marked “DB” or “Dir Bur.”
The Listing mark on the product, or
on a product tag or product container
will identify the product as grounding
and bonding equipment.
The “UL Question Corner” answers questions of general interest that are sent in from
authorized government inspectors that we believe will have interest for many inspectors.
Please send us questions you may have
that are general interest, and we will have
UL engineers answer them in a future issue. If space does not permit answering all
questions, we’ll see that you get an answer
by letter.
Send your questions to: iaei@iaei.org, or
UL Question Corner, IAEI News
PO Box 830848
Richardson, TX 75083
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