Instructions / Assembly

8
Installing the water heater.
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.
Electrical Connections
WARNING
WARNING
Water heater junction box.
Junction
box cover
Wire connections
Ground screw
Conduit
connector
A separate branch circuit with copper
conductors, overcurrent protective device
and suitable disconnecting means must be
provided by a qualified electrician.
All wiring must conform to local codes or
latest edition of National Electrical Code
ANSI/NFPA 70.
The water heater is completely wired to
the junction box inside jacket at the top
front of the water heater. An opening for
1/2″ or 3/4″ electrical fitting is provided
for field wiring connections.
The voltage requirements and wattage
load for the water heater are specified on
the rating plate on the front of the water
heater.
The branch circuit wiring should include either:
Metallic conduit or metallic sheathed
cable approved for use as a
grounding conductor and installed
with fittings approved for the
purpose.
Non-metallic sheathed cable, metallic
conduit or metallic sheathed cable not
approved for use as a ground
conductor shall include a separate
conductor for grounding. It should be
attached to the ground terminals of
the water heater and the electrical
distribution box.
!
CAUTION: The presence of water in
the piping and water heater does not
provide sufficient conduction for a
ground. Non-metallic piping, dielectric
unions, flexible connectors etc. can cause
the water heater to be electrically
isolated.
DO NOT turn on the
electrical supply or operate
this water heater unless it is
completely full of water.
Single 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)
120V 208V 240V 277V 480V 120V 208V 240V 277V 480V
1,500 20 15 15 15 15 12 14 14 14 14
2,000 25 15 15 15 15 10 14 14 14 14
3,000 35 20 20 15 15 8 12 12 14 14
4,000 - 25 25 20 15 - 10 10 12 14
4,500 - 30 25 25 15 - 10 10 10 14
5,000 - 30 30 25 15 - 10 10 10 14
5,500 - 35 30 25 15 - 8 10 10 14
6,000 - 40 35 30 20 - 8 8 10 12
8,000 - 50 45 40 25 - 8 8 8 10
9,000 - - 50 45 25 - - 8 8 10
10,000 - - - 50 30 - - - 8 10
11,000 - - - 50 30 - - - 8 10
12,000 - - - - 35 - - - - 8
See the top of next page for 3 Phase wiring.
Branch Circuit Sizing and Wire Size Guide