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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
Total Water
Heater Wattage
Recommended Over Current
Protection Copper (fuse or circuit
breaker amperage rating)
Wire Size AWG Based on N.E.C.
Table 310-16 (75°C)
120V 240V 120V 240V
2,000 20 ---- 12 ----
3,000 ---- 20 ---- 12
3,800 ---- 20 ---- 12
4,500 ---- 25 ---- 10
Wiring Diagrams
SINGLE ELEMENT
2
1
2
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
HEATING
ELEMENT
WHITE
YELLOW
BLACK
H
JUNCTION
BOX
N
1
G
*
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
2
1
2
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
HEATING
ELEMENT
BLUE
YELLOW
BLACK
L1
G
*
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
JUNCTION
BOX
4
L2
RED
1 3
SINGLE ELEMENT
DOUBLE ELEMENT
YELLOW
LOWER
HEATING
ELEMENT
2
UPPER THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
UPPER
HEATING
ELEMENT
BLUE
YELLOW
BLACK
L1
JUNCTION
BOX
4
L2
RED
1 3
1
2
BLACK
RED
LOWER
THERMOSTAT
1
2
4
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
G
*
240 Volt
120 Volt
240 Volt
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