2101 Commonwealth Blvd, Suite B
Ann Arbor, MI 48105-5759 www.med.umich.edu/facilities/plan/
Basis Guideline: 260513 – “Medium, Low and Control Voltage Cables”
For an explanation of the use of these guidelines, see “ Design Guidelines for UMHHC Facilities ”
Color code the conductors of all power risers, feeder circuits, branch circuits, etc.
1. Entire conductor may be of noted color (preferred) or larger conductors may be tape coded at all panels, junction boxes, enclosures or outlets. Conductors #6 awg and smaller, however, shall be color coded throughout.
2. Conductors in buildings fed from the Detroit Edison Academy Substation are to have the following color coding. These buildings include University Hospital, Taubman Health Center, old
Mott, MCHC, Holden, parts of East mechanical Building, and the Cancer Center
Service: X(A) Y(B) Z(C) NEUT.
Above 600 volts
480/277 volts
208/120
240/120 volts*
Black
Red
Yellow
Brown
(Conductor. #2)
Red
Blue
Orange
---
Blue
Black
Brown
---
---
Gray
White
Orange
(Conductor #1)
Less than 120 volts
(Use industry, manufacturers, or existing building standard for like systems)
*For isolated power supply (IPS) branch circuits in OR’s, and like rooms
3. Color coding of conductors, for all other buildings, fed from the U of M Campus Distribution
System, and other utility sources, are to match the campus color code as noted in UM AEC
Guideline 260513.
Color coding of all electrical panels, individual transfer switches, motor controls, MCC's, junction boxes, pull boxes, control panels, etc.
1. Panels, Motor Control Center, Junction Box Covers
Life Safety Power, panels, JB covers, etc.
Critical Power, panels, JB covers, etc.
Equipment I Power, panels, JB covers, etc
Equipment II Power, panels, JB covers, etc.
OSHA Safety Red, or manufacturer equal
OSHA Safety Orange, or manufacturer equal
OSHA Safety Yellow, or manufacturer equal
OSHA Safety Purple, or manufacturer equal
Central UPS system panels, JB covers, etc.
Emergency power outlet covers, etc.
Review with UMHHC Engineer
Standard Red for Manufacturer
Note : If conduit of the appropriate color is being used for a given system, the associated junction boxes and pull boxes do not need to color coded also.
2. Fire Alarm, and Fire Suppression Systems/Devices
Fire Alarm FACP and Devices
Fire Pump/Controller/Devices
Fire alarm JB covers, etc.
Standard Red for Manufacturer
Standard Red for Manufacturer
OSHA Safety Red
3. Preferably the entire enclosures of the panels, MCC's, switchboards, junction box, pull box and substations will be painted to noted color code. At the minimum, however, the covers and doors
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of these equipments shall be color coded. Junction and pull boxes may be field painted, all other equipment shall be factory painted.
4. Other systems may be left in the standard finish as received from the manufacturer.
Color Coding of Power Receptacles, Light switches, and Wall Plates
1. Receptacles:
Normal power receptacles
Emergency power receptacles
Central UPS (with generator back-up
Central UPS (without generator back-up)
Special Power (not 125-volt, 1-phase)
‘Purple Power’ power receptacles
Standard Brown or Ivory for Manufacturer
Standard Red for Manufacturer
Standard Red for Manufacturer
Standard Gray for Manufacturer
Standard Black for Manufacturer
Standard Brown or Ivory for Manufacturer
2. Lighting Switches
Normal power receptacles
Emergency power receptacles
‘Purple Power’ power receptacles
Standard Brown or Ivory for Manufacturer
Standard Red for Manufacturer (See Note)
Standard Brown or Ivory for Manufacturer
Note: Emergency system special power outlets, light dimmers, and the like, that are not available in red may be supplied in black, ivory or brown. If other than red is used, however, the cover plate must be red.
3. Receptacle and Lighting switch Wall/Cover Plates
Normal power
Emergency power
UPS (with generator back-up)
UPS (Second system w/ gen. back-up)
Standard Brushed Stain. Steel for Manufacturer
Standard Red for Manufacturer
Standard Gray for Manufacturer
Standard Black for Manufacturer (See Note)
UPS (without generator back-up)
Special Power (not 125-volt, 1-phase)
Standard Gray for Manufacturer
No standard (Label very clearly)
Note: This designation, only applies to locations with two (main and back-up) UPS’s. Currently only the
North Campus Data Center has main and back-up UPS’s
Panel Naming
1. In buildings being renovated, or expanded, the existing panel naming scheme will be continued.
Ask UMHHC Project Manager for the next sequential panels number/name. Do not duplicate existing panel number/names.
2. In new buildings establish a naming scheme that is consistent and easily understandable.
Whenever possible use with the following as a model: a. First part of name to be functionally related (see note below.)
PP
RP
Power Panel
Receptacle (normal) Panel
LP Lighting (normal) Panel
CRP "Critical" receptacle Panel
LRP "Life Safety" receptacle Panel
EQP Equipment Power Panel
LLP
CLP
Life Safety Lighting Panel
Critical Lighting Panel
EMCC Emergency Motor Control Center
UPS UPS System b. Second part of name is to reflect building section/zone. If building is small; (i.e., only one "Zone"), this portion of name may be eliminated.
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c. Third part is a sequential letter if there is more than one panel of this type in the given area. d. Last part of name to reflect floor number. e. An example is CRP-BA-2: critical receptacle power, in section B, ("A" denotes second panel in area), on second floor - first such panel would have been CRP-B-2.
Note: Typically, only receptacles, incandescent lighting and very small motors (less than 1/2 HP and appliances are connected to receptacle panels. In a like manner, building lighting, transformers, and small single-phase motors are typically connected to lighting panels. In buildings with multiple secondary voltages, Receptacle panels are typically 208/120 volts; Lighting panels are typically 480/277 volts.
Equipment Labeling:
Electrical distribution equipment, in addition to panels and related equipment noted in item 3, shall also be labeled. Equipment to be labeled includes duplex and power receptacles, motor disconnect switches, motor starters, VFD’s and equipment disconnect switches. The label shall include equipment name, and function, power source, power source room number and load served as appropriate. Submit list of labels for review by University of Michigan Hospitals.
Outlet and Lighting Switch Labeling:
Label the coverplate, and front edge of associated box, of all receptacles and lighting switches. Label shall identify panel name, and circuit number, of source. If project is in a leased facility, ask Design
Manager if labeling will be required for that project.
Auxiliary System Device Labeling:
1. Security systems equipment shall include a device number using phenolic tags. These device numbers will be defined in contract documents. Ask UMHHC Project Manager for assistance in naming, if needed.
2. Fire alarm systems equipment, devices, monitoring modules, control modules shall be labeled as to function, and point or zone number/name.
3. Intercoms shall have station number or address labeled clearly on device.
4. Observational TV systems, EEG systems and other remotely connected/monitored systems shall have their outlets labeled as to function, systems name, and location of remote device. Submit list of proposed labels for review by Owner before fabricating labels.
Method of Tagging, Marking:
1. Lettering for identification is to be of engraved laminated phenolic tags, white background with
1/2" black lettering. Tags are to be held in place with small bolts and nuts or self tapping screws; adhesive tape of any form is not acceptable.
2. All major pull, and junction boxes, in service areas, tunnels, above accessible ceilings and in accessible chases are to have 1/2" black lettering on the box, identifying the feeder or system.
3. Systems with conductors exceeding 240 volts to ground are to have voltage identification stenciled with 1" high black letters on all panels, switches, pull boxes, junction boxes. For cables above 1000 volts, label conduit every 30 feet along exposed conduits. Flush panels in finished areas are to be lettered inside the door. Example: 480 volts.
4. Conduits entering junction boxes, enclosures, etc., shall be marked showing panel name and circuit number.
5. Panel boards are to have typewritten circuit directories installed inside the doors under a transparent plastic cover. Circuit directories are to identify, as-built configurations, for each circuit, the type of load (lighting, outlets, equipment item) and room numbers of areas served.
Provide draft copy of directory for Owner’s review before final typing. Label panel board with location of feeder.
6. Power panels and switchgear, without doors, are to have circuit breakers and switches identified by engraved phenolic tags as described in paragraph 4, above, affixed to the enclosing door, or immediately adjacent to the device.
Wire Labeling
1. Power Wiring
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a. Inside each outlet box, junction box, and pull box, note, using a permanent marker, the source panel and circuit number(s) for all wiring passing through the box. b. In like manner label the cover also if box is in a concealed area. c. Label the conduits entering box with the panel number and circuit number of the wires in that conduit.
2. Non-Power Systems Wiring a. All control, signal, fire alarm, security and other like special systems cables shall be labeled in all junction boxes, device locations, and enclosures. b. All junction boxes shall be labeled as to function. Use permanent markers, and write functions in a visible location...inside the boxes, and on the covers where box is in a concealed area.
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