11
!
DANGER: Elements should only be replaced with an element of the same power rating
that was factory installed, and corresponds to the rating label on the unit.
NOTICE: This guide recommends minimum branch circuit sizing and wire size based on National Electric Code. Refer to
wiring diagrams in this manual for field wiring connections.
Branch Circuit Sizing and Wire Size Guide
Single Phase Wiring
3 Phase Wiring
Total
Water
Heater
Wattage
Recommended Over Current Protection
(Fuse or circuit breaker amperage rating)
Copper Wire Size AWG Based on NE.C.
Table 310-16 (75°C)
208V 240V 277V 415V 480V 208V 240V 277V 415V 480V
3,000 20 20 15 15 15 12 12 14 14 14
4,000 25 25 20 15 15 10 10 12 14 14
4,500 30 25 25 15 15 10 10 10 14 14
5,000 30 30 25 15 15 10 10 10 14 14
5,500 35 30 25 15 15 8 10 10 14 14
6,000 40 35 30 20 20 8 8 10 12 12
8,000 50 45 40 25 25 8 8 8 10 10
9,000 60 50 45 25 25 6 8 8 10 10
10,000 70 60 50 30 30 6 6 8 10 10
11,000 70 60 50 30 30 4 6 8 10 10
12,100 80 70 60 35 35 4 6 6 8 8
Total
Water
Heater
Wattage
Recommended Over Current Protection
(Fuse or circuit breaker amperage rating)
Copper Wire Size AWG Based on NE.C.
Table 310-16 (75°C)
208V 240V 277V 415V 480V 208V 240V 277V 415V 480V
3,000 20 20 - 15 15 12 12 - 14 14
4,000 25 25 - 15 15 10 10 - 14 14
4,500 30 25 - 15 15 10 10 - 14 14
5,000 30 30 - 15 15 10 10 - 14 14
5,500 35 30 - 15 15 8 10 - 14 14
6,000 40 35 - 20 20 8 8 - 12 12
8,000 50 45 - 25 25 8 8 - 10 10
9,000 50 50 - 25 25 8 8 - 10 10
10,000 60 50 - 30 30 6 8 - 10 10
11,000 60 50 - 30 30 6 8 - 10 10
12,100 70 50 - 35 35 6 6 - 8 8
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