WIRE COLORS FOR 115V SINGLE PHASE

[fifty60]

If I have equipment that is powered from a 115V single phase, then none of the wiring should be white right? Per NFPA 79 all of the wiring at line voltage should be black, whereas AC voltages below line voltage should be red?

Would the 115V inside equipment all have to be red? Should anything at 115V standard wall voltage be black? There should not be any white line wires unless one of the 115V lines is a grounded phase from a secondary of a transformer, but this is not the case with 115 out of your wall right?

 

[petersonra]

If I have equipment that is powered from a 115V single phase, then none of the wiring should be white right? Per NFPA 79 all of the wiring at line voltage should be black, whereas AC voltages below line voltage should be red?

Would the 115V inside equipment all have to be red? Should anything at 115 be black? There should not be any white phase wires unless the 115V is derived from a gounded phase of a secondary of a transformer, but this is not the case with 115 out of your wall right?

Both NFPA79 and NEC require grounded conductors be white (or gray sometimes).

Common 115V outlets all have a grounded conductor.

Most people consider line voltage to be anything over 120VAC for the purposes of compliance with NFPA79.

 

[fifty60]

Both NFPA79 and NEC require grounded conductors be white (or gray sometimes).

Common 115V outlets all have a grounded conductor.

Ah yes, that is correct, the center tap is the grounded point. Thanks!

 

[Aleman]

If I have equipment that is powered from a 115V single phase, then none of the wiring should be white right? Per NFPA 79 all of the wiring at line voltage should be black, whereas AC voltages below line voltage should be red?

Would the 115V inside equipment all have to be red? Should anything at 115V standard wall voltage be black? There should not be any white line wires unless one of the 115V lines is a grounded phase from a secondary of a transformer, but this is not the case with 115 out of your wall right?

None of the ungrounded wires should be white, only the neutral as you know. We use red for 120V wiring, black for everything else in a panel. I didn't know till now that they call line 120 or over. So I guess that's why the '115' is red.

 

[fmtjfw]

Technical power system? no color specifed

Technical power system? no color specifed

640.2 Technical Power System. An electrical distribution system
with grounding in accordance with 250.146(D), where the
equipment grounding conductor is isolated from the premises
grounded conductor except at a single grounded termination
point within a branch-circuit panelboard, at the
originating (main breaker) branch-circuit panelboard, or at
the premises grounding electrode.

647.4 Wiring Methods.
(C) Conductor Identification. All feeders and branch-circuit
conductors installed under this section shall be identified
as to system at all splices and terminations by color,
marking, tagging, or equally effective means. The means of
identification shall be posted at each branch-circuit panelboard
and at the disconnecting means for the building.
647.7 Receptacles.
(A) General. Where receptacles are used as a means of connecting
equipment, the following conditions shall be met:
(1) All 15- and 20-ampere receptacles shall be GFCI protected.
(2) All receptacle outlet strips, adapters, receptacle covers,
and faceplates shall be marked with the following
words or equivalent:
WARNING ? TECHNICAL POWER
Do not connect to lighting equipment.
For electronic equipment use only.
60/120 V. 1?ac
GFCI protected
(3) A 125-volt, single-phase, 15- or 20-ampere-rated receptacle
having one of its current-carrying poles connected to
a grounded circuit conductor shall be located within 1.8 m
(6 ft) of all permanently installed 15- or 20-ampere-rated
60/120-volt technical power-system receptacles.
(4) All 125-volt receptacles used for 60/120-volt technical
power shall have a unique configuration and be identified
for use with this class of system.
Exception: Receptacles and attachment plugs rated 125-
volt, single-phase, 15- or 20-amperes, and that are identified
for use with grounded circuit conductors, shall be permitted
in machine rooms, control rooms, equipment rooms,
equipment racks, and other similar locations that are restricted
to use by qualified personnel.
(B) Isolated Ground Receptacles. Isolated ground receptacles
shall be permitted as described in 250.146(D); however,
the branch-circuit equipment grounding conductor
shall be terminated as required in 647.6(B).