17
eLeCTRICAL CONNeCTIONS
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 at the
top of the water heater. An opening for 1/2” electrical fitting is
provided for field wiring connections.
The voltage requirements and wattage load for the water
heater are specified on the rating label on the front of the
water heater.
The branch circuit wiring should include either:
1. Metallic conduit or metallic sheathed cable approved
for use as a grounding conductor and installed with
fittings approved for the purpose.
2. Nonmetallic 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.
To connect power to the water heater:
1. Turn the power off.
2. Remove the screw/screws holding the junction box
top cover.
3. Install L1 to L1, L2 to L2 and ground to the green
ground wire connected to the bottom of the junction
box.
NOTE: Install electric connections according to local
codes or latest edition of National Electrical Code ANSI/
NFPA 70.
WARNINg:
Proper ground connection is
essential. The presence of water in the piping and water
heater does not provide sufficient conduction for a
ground. Nonmetallic piping, dielectric unions, flexible
connectors, etc., can cause the water heater to be
electrically isolated. do not disconnect factory ground.
240V
Junction box cover
Junction box
Factory Ground
House Ground (Green)
L2 (Red)
L1 (Black)
Installation Instructions
The manufacturer’s warranty does not cover any damage or
defect caused by installation, attachment or use of any type of
energy-saving or other unapproved devices (other than those
authorized by the manufacturer) into, onto or in conjunction
with the water heater. The use of unauthorized energy-saving
devices may shorten the life of the water heater and may
endanger life and property.
The manufacturer disclaims any responsibility for such loss or
injury resulting from the use of such unauthorized devices.
If local codes require external application of insulation blanket
kits, the manufacturer’s instructions included with the kit must
be carefully followed.
Application of any external insulation, blankets or water
pipe insulation to this water heater will require careful
attention to the following:
• Do not cover the temperature and pressure-relief valve.
• Do not cover access panels to the heating elements.
• Do not cover the electrical junction box of the
water heater.
• Do not cover the operating or warning labels attached to the
water heater or attempt to relocate them on the exterior of
the insulation blanket.
• Do not block the air inlet/outlets in the top covers or rear of
the unit.
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
Total Water
Recommended Over-Current Protection
Heater Wattage
(fuse or circuit breaker amperage rating)
208V
240V
277V
480V
3,000
20
20
15
15
4,000
25
25
20
15
4,500
30
25
25
15
5,000
30
30
25
15
5,500
35
30
25
15
6,000
40
35
30
20
8,000
50
45
40
25
9,000
–
50
45
25
10,000
–
–
50
30
11,000
–
–
50
30
12,000
–
–
–
35
Total Water
Copper Wire Size AWg Based
Heater Wattage
on N.e.C. Table 310-16 (167°f/75°C.)
208V
240V
277V
480V
3,000
12
12
14
14
4,000
10
10
12
14
4,500
10
10
10
14
5,000
10
10
10
14
5,500
8
10
10
14
6,000
8
8
10
12
8,000
8
8
8
10
9,000
–
8
8
10
10,000
–
–
8
10
11,000
–
–
8
10
12,000
–
–
–
8
Summary of Contents for RE2H50R10B-1NCWT
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