Attachment 1: Specifications - Metropolitan Washington Airports ...

DCA TERMINAL A IMPROVEMENTS (NEAR TERM) 10 AUGUST 2012
TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 - CURBSIDE CHECK-IN
RONALD REAGAN WASHINGTON NATIONAL AIRPORT
PROJECT DT1203
D. Medium Voltage Cable Identification: In manholes indicate voltage, feeder number and phase
letter on each cable. Inside equipment indicate phase letter on each cable. Install markers on
cables after arc proofing is applied. Attach with cable ties.
E. Low Voltage Conductor Color-Coding: Provide color coding for as follows:
208/120 Volts Phase 480/277 Volts
Black A Yellow
Red B Brown
Blue C Orange
White Neutral Gray
Green Ground Green
F. Use low voltage conductors with color factory-applied the entire length of the conductors
except as follows:
1. The following color-coding methods may be used in lieu of factory color-coded wire for
sizes No. 4 AWG and Larger.
a. Apply colored, pressure-sensitive plastic tape in half lapped turns for a distance of
6 inches from terminal points and in boxes where splices or taps are made. Apply
the last two laps of tape with no tension to prevent possible unwinding.
G. Provide warning, caution, and instruction signs as follows:
1. Install warning, caution, or instruction signs where required by NEC, where indicated, or
where required for safe operation and maintenance of electrical systems. Install engraved
plastic laminated instruction signs where instructions or explanations are needed for
system or equipment operation. Install butyrate signs with metal backing for outdoor
items. Attach signs to outdoor equipment using two-part epoxy cement.
H. Provide equipment/system, circuit/device identification as follows:
1. Provide engraved plastic laminate identification markers on electrical equipment. For
240V systems and below provide white lettering on black background. For 480/277V
systems, use black lettering on yellow background. Text shall match terminology and
numbering specified in the MWAA Design Manual. Apply markers on all of the
following:
a. Panelboards, electrical cabinets, and enclosures.
b. Contactors.
c. Transformers.
d. Disconnect switches.
e. Control equipment.
f. Circuit breakers
I. Circuit Schedules: For panelboards provide typed circuit schedules with identification of items
controlled by each breaker.
IDENTIFICATION FOR ELECTRICAL SYSTEMS 26 05 53- 3