ELECTRICAL
ELECTRICAL CONNECTIONS
Risk of electric shock. This pump is sup-
plied with a grounding conductor and grounding-type
attachment plug. To reduce the risk of electric shock,
be certain that it is connected only to a properly
grounded, grounding-type receptacle.
The Sump Pump has a 3-prong electric plug. The third prong
is used to ground the pump to prevent possible fatal shock.
The third prong should never be removed. Your electrical
outlet should be the 3-prong, polarized type with an inter-
nal ground.
A separate 15 amp individual branch electrical circuit is rec-
ommended.
DO NOT USE AN EXTENSION CORD.
Testing For Ground
For your safety, check your outlet for ground using an
Underwriters Laboratory Listed Circuit Analyzer. (Figure
3A). A Circuit Analyzer will tell you by a pattern of lights if
the power, neutral, and ground wires are correctly con-
nected to your outlet. It can also be used to check other out-
lets in your home. A Circuit Analyzer is available in the Sears
Electrical Department.
Grounding Outlet
If your outlet is not grounded, install a copper wire (at least
14 gauge) from the outlet box, as shown in Figure 3B, to a
metal cold water pipe. Use ground clamp on pipe.
IMPORTANT:
The cold water pipe you use as a ground
must have metal continuity to electrical ground. If continu-
ity is interrupted by plastic, rubber, or other electrical insu-
lators; such as hoses, fittings, washers or gaskets (including
water meter or pump), a metal bypass must be used. Any
electrically insulated connector should be jumped (as shown
in Figure 3C), with a length of No. 4 wire clamped securely
at both ends.
Automatic Thermal Overload Protection
This pump motor has a built-in automatic thermal overload
protector. If the motor overheats, the protector will open
and cut off power to the motor before the heat damages it
internally. The overload will reset automatically and the
pump will restart after the pump cools down below the dan-
ger point.
DO NOT attempt to work on the pump or
motor if the overload seems to have tripped. The
motor may restart without warning at any time. You
could be injured and the pump damaged if it starts
when you are working on it. Remove all power from
pump before attempting to work on it.
DO NOT
attempt to repair a non-operational sump pump.
Take it to Sears for service by a qualified technician.
Generator Sizing
Below is the minimum Engine-Generator Watt rating re-
quired to power this pump motor. Any additional loads,
such as lights, must be added to the listed load and the gen-
erator sized accordingly.
Pump
Minimum Watt
Model
HP
Rating of Generator
390.304790
1/3
3400
390.305790
1/2
4200
4
UL Listed
Analyzer
Outlet
Face Plate
Outlet
Outlet
Box
Bare Copper Wire
to Cold Water Pipe
Face
Plate Screw
No. 4
Wire
Clamp
Metal Water Pipe
Meter
Clamp
FIGURE 3A
FIGURE 3B
FIGURE 3C
Summary of Contents for CRAFTSMAN 390.304790
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