State P6 20 10 MS K - Manual (Page 9)

Installing the New Water Heater (cont’d)
3. If metal conduit is used for the grounding conductor:
A. The grounding electrode conductor shall be of cop-
per, aluminum, or copperclad aluminum. The mate-
rial shall be of one continuous length without a
splice or joint.
B. Rigid metal conduit, intermediate metal conduit, or
electrical metallic tubing may be used for the
grounding means if conduit or tubing is terminated
in fittings approved for grounding.
C. Flexible metal conduit or flexible metallic tubing
shall be permitted for grounding if all the following
conditions are met:
1. The length in any ground return path does not
exceed 6 feet.
2. The circuit conductors contained therein are pro-
tected by overcurrent devices rated at 20
amperes or less.
3. The conduit or tubing is terminated in fittings
approved for grounding.
For complete grounding details and all allowable excep-
tions, refer to the latest edition of the National Electrical
Code.
4. A standard 1 ⁄
2
″ conduit opening has been made in the
water heater junction box for the conduit connection.
5. Use wire nuts and connect the power supply wiring to
the wires inside the water heater’s junction box.
6. The water heater must be electrically “grounded” by
the installer. A green ground screw has been provided
on the water heater’s junction box. Connect ground
wire to this location.
7. Replace the wiring junction cover using the screw
provided.
WIRE NUTS
GREEN GROUND SCREW
JUNCTION
BOX
COVER
CONDUIT
TO POWER
SUPPLY
9
Wiring
1. Provide a way to easily shut off the electric power
when working on the water heater. This could be with
a circuit breaker or fuse block in the entrance box or a
separate disconnect switch.
2. Install and connect a circuit directly from the main fuse
or circuit breaker box. This circuit must be the right
size and have its own fuse or circuit breaker.
WARNING
WATER HEATERS EQUIPPED FOR ONE VOLTAGE ONLY:
This water heater is equipped for one type voltage only.
Check the rating plate near the bottom access panel for
the correct voltage. DO NOT use this water heater with
any voltage other than the one shown on the model rating
plate. Failure to use the correct voltage can cause prob-
lems which can result in DEATH, SERIOUS BODILY
INJURY, OR PROPERTY DAMAGE. If you have any ques-
tions or doubts consult your electric company.
CAUTION
Never use this water heater unless it is completely full of
water. To prevent damage to the tank and heating element,
the tank must be filled with water. Water must flow from
the hot water faucet before turning “ON” power.
CAUTION
If wiring from your fuse box or circuit breaker box was
aluminum for your old water heater, replace it with cop-
per wire. If you wish to reuse the existing aluminum wire,
have the connection at the water heater made by a com-
petent electrician. Contact a local electrical contractor
and/or the local electric utility.
You must provide all wiring of the proper size outside of
the water heater. You must obey local codes and electric
company requirements when you install this wiring.
If you are not familiar with electric codes and practices,
or if you have any doubt in your ability to connect the
wiring to this water heater, obtain the service of a compe-
tent electrician. Contact a local electrical contractor
and/or the local electric utility.