American Standard HPWH50G-AS Owners And Operation Manual page 21

NOTE: This guide recommends minimum branch circuit sizing based on the National Electric Code. Refer to wiring
diagrams in this manual for field wiring connections.
BRANCH CIRCUIT SIZING GUIDE
Water Heater
Wattage
3,000
4,000
4,500
5,000
5,500
6,000
8,000
9,000
10,000
11,000
12,000
Water Heater
Wattage
3,000
4,000
4,500
5,000
5,500
6,000
8,000
9,000
10,000
11,000
12,000
Recommended Over-Current Protection
– Fuse or Circuit Breaker Amperage Rating –
208 V 240 V
20 20
25 25
30 25
30 30
35 30
40 35
50 45
50
-
- -
- -
- -
Copper Wire Size AWG Based
Heater Wattage on N.E.C. Table 310-16 (75°C)
240 V
208 V
12
12
10
10
10 10
10 10
8 10
8 8
8 8
- 8
-
-
-
-
- -
277 V 480 V
15 15
15
20
25 15
25 15
25 15
30 20
40 25
45 25
50 30
30
50
35
-
277 V 480 V
14 14
12 14
10 14
14
10
10 14
10 12
8 10
8 10
8 10
8 10
- 8
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