Electrical 42 lab 1
Updated
A PDF document (1.4 MB) attached to 657A5-26-111, Triennial Electrical Testing, from the Department of Veterans Affairs. Due Nov 9, 2026, 3:00 PM (UTC-6).
File name: 10-Electrical 42 lab 1.pdf
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FEEDER #3
DISTRIBUTION PANEL "USUB-A"
480Y/277V-3PH-4W
2000A
100 E
200A
GFP
MINERAL OIL
FILLED XFMR
GFP
250A
GFP
250A
GFP
GFP
SPARE
225AT
225A
GFP
250A
GFP
SPARE
GFP
SPARE
DISTRIBUTION PANEL "USUB-B/42-DP-2"
100 E
480Y/277V-3PH-4W
600A
100 E
300 KVA
12,470 V
208V
5.72%
DISTRIBUTION PANEL "42-DP1"
96 KVAD (268 AMPS DEMAND) PER METER
+ 57 KVAD NEW
= 153 KVAD (425 AMPS)
SWBD
METERING
1000A
208Y/120V-3PH-4W
A
800A
200A
150A
GFP
200A
200A
200A
150A
100A
100 E
SPARE
MINERAL OIL
FILLED XFMR
GFP
1500 KVA
12,470 V
480V
5.72%
6"
789 KVAD (949 AMPS DEMAND) PER METER
SWBD
METERING
200A
200A
GFP
200A
GFP
200A
GFP
200A
GFP
250A
600A
GFP
200A
GFP
GFP
N
E
N
E
N
E
N
E
N
E
"42-8"
42-ATS-EL
42-ATS-CATH-1A
(ABANDON)
42-ATS-EC
42-ATS-CATH-1
(ABANDON)
"42-1"
X-RAY
SCAN
"42-3"
"42-7"
"42-5"
"RC120 X-RAY"
"42-A"
"42-6"
"42-6A"
"42-4"
"42-4A"
"42-2"
42-9
(LAB ADDITION
277V LTG)
6"
42-ATS-EQ
"42-8B"
"CATH-1A"
(ABANDON)
600A
200A
SPARE
SPARE
100A
225A
225A
36 KVAD (44 AMPS) PER METER
LIFE SAFETY BRANCH
CRITICAL BRANCH
DISTRIBUTION PANEL "42-EMDP-EL-1"
200A
"42-2A"
B
"CATH-1"
(ABANDON)
50 KVAD (60 AMPS) PER METER
+ 67 KVAD NEW
= 117 KVAD (140 AMPS)
DISTRIBUTION PANEL "42-DP-2-1"
DISTRIBUTION PANEL "42-EMDP-EC-1"
225A
100A
200A
SPARE
SPARE
200A
200A
200A
480Y/277V-3PH-4W
480Y/277V-3PH-4W
800A
6"
one inch = one foot
B
one and one half inches = one foot
A
three inches = one foot
FEEDER #1
G
PANEL "42-EMPD-1"
BLDG 42 GEN
625 KVA
100A
100A
50A
100A
100A
480Y/277V-3PH-4W
100A
SPARE
100A
100A
100A
100A
200A
100A
SPARE
C
100A
SPARE
30 KVA
"42-EL-1"
"42-EL-3"
"42-EL-5"
(LAB ADDITION
EM LTG)
"42-10"
EXIST.
TX-42032 42-T-EC
150 KVA
"42-EL-7"
"42-EC-1"
"42-EC-3"
"42-EC-5"
"42-10C"
100A MB
CRITICAL BRANCH
"42-EMCP-EL-1"
"42-EL-4"
DIST. PANEL "42-EMDP-EC-2"
400A
208Y/120V-3PH-4W
42-EL-2
42-EL-6
42-EL-8
145 KVAD (175 AMPS) PER METER
+ 55 KVAD NEW (LAB)
+ 89 KVAD (CU-1)
= 289 KVAD (347 AMPS) NEW
200A
200A
200A
200A
200A
200A
200A
480Y/277V-3PH-4W
100A
200A
125A
200A
200A
200A
200A
"42-EC-2"
125A
200A
150A
150A
"42-EC-4"
"42-EC-4A"
"42-EC-6"
1. REMOVE 200A /3P BREAKER AND REPLACE W ITH 600A/3P GFP BREAKER (SET TRIP
AT 600A).
2. UTILIZE SPARE BREAKER FOR NEW PANEL FEEDER.
3. REFER TO PRIMARY SINGLE LINE DIAGRAM FOR REMOVALS / NEW W ORK. 4. RUN 4-#2, #8 GRD. IN 1.25"C.
5. PROVIDE NEW 480V-100A/3P CIRCUIT BREAKER IN EXISTING PANEL. 6. RUN 4-#3/0, #6 GRD. IN 2"C.
7. RUN 3-#4, #10 GRD. IN 1"C.
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