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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.
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 temperature and
pressure relief valve.
● Do not cover jacket access panels to
thermostats and 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 insulation blanket.
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.
Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service
Insulation Blankets