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9
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
Total Water Recommended Over Current Protection Copper Wire Size AWG Based
Heater Wattage (fuse or circuit breaker amperage rating) on N.E.C. Table 310-16 (75°C.)
120V 208V 240V 120V 208V 240V
1500* 20 15 15 12 14 14
1700 20 15 15 12 14 14
2000 25 15 15 10 14 14
2500 30 15 15 10 14 14
3000 35 20 20 8 12 12
3500 – 25 20 – 10 12
3800 – 25 20 – 10 12
4000 – 25 25 – 10 10
4500 – 30 25 – 10 10
5000 – 30 30 – 10 10
5500 – 35 30 – 8 10
6000 – 40 35 – 8 8
9000 – – 50 – – 8
* Less than 1500 watts may be wired 14 gauge with 15 amp protection. Check Local Electrical Codes, as they will also apply.
Insulation blankets, available to the
general public, for external use on electric
water heaters are not necessary. The
purpose of an insulation blanket is to
reduce the standby heat loss encountered
with storage tank heaters. This water
heater meets or exceeds the National
Appliance Energy Conservation Act
standards with respect to insulation and
standby loss requirements making an
insulation blanket unnecessary.
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.
CAUTION: If local codes require the
application of an external insulation
blanket to this water heater, pay careful
attention to the following so as not to
restrict the proper function and
operation 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 insulation blanket.
DO NOT apply insulation to the top
of the water heater. This could interfere
with the safe operation of the electrical
junction box.
DO NOT cover the jacket access
panel(s) to the thermostat(s) and heating
element(s), or pressure and temperature
relief valve.
Inspect the insulation blanket frequently.
WARNING: If
local codes require
external application
of insulation blanket
kits the
manufacturer’s
instructions included
with the kit must be
carefully followed.
Insulation Blankets
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