Electrical - A.O. Smith DRE-52 Series Instruction Manual

The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power
company. In the absence of local codes, the installation must comply with the current editions of the National Electrical Code, NFPA 70 or
the Canadian Electrical Code CSA C22.1.
An electrical ground is required to reduce risk of electrical shock or possible electrocution. The water heater should be connected to a
separate grounded branch circuit with over-current protection and disconnect switch. The water heater should be grounded in accordance
with national and local codes.
Voltage applied to the heater should not vary more than +5% to -10% of the model and rating plate marking for satisfactory operation.
Not more than three conductors in raceway, cable, or earth (directly buried), based on ambient temperature of 30°C (86°F)
+The load current rating and the overcurrent protection for these conductors shall not exceed 15 amperes for 14 AWG. 20 amperes for 12 AWG.
and 30 amperes for 10 AWG copper; or 15 amperes for 12 AWG and 25 amperes for 10 AWG aluminum and copper-clad aluminum.
*For dry locations only. See 75°C column for wet locations.

ELECtrICAL

GEnErAL
Allowable Ampacities of Insulated Conductors
table 3.
12