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Pre-Installation
Calculating Cable Size
When two different sizes can
be used (calculated in feet)
Sometimes conditions make it desirable to use
more than one size cable in an installation.
buried between the service entrance and the well
well? Calculate as follows:
160 Ft. #12AWG
(55.9% of Allowable Cable)
Cable
Pump
Controls
Service Entrance
2 HP (1.5 kw)
(Main Fuse Box
230V 1Ph Motor
From Meter)
Table VIII
motor. The percent of this total that has been
the well. To avoid running a cable that is too
small and lowering the voltage to the motor,
we have to find a cable size large enough so
allowed for that size.
Table VIII shows that
the total allowable length for a 2 HP motor
This is not long enough.
Table VIII shows that the
total allowable length is 722'.
the well.
Any combination of sizes can be used,
provided that the total percentage of the length
of the two sizes of cable does not exceed
When two different sizes can be
used (calculated in meters)
Sometimes conditions make it desirable to use
more than one size cable in an installation.
buried between the service entrance and the well
well? Calculate as follows:
(56% of Allowable Cable)
210 Ft. #8AWG
(44.1% of
Allowable
Cable)
Service Entrance
(Main Fuse Box
From Meter)
motor. The percent of this total that has been
well. To avoid running a cable that is too small
and lowering the voltage to the motor, we have
that size.
the total allowable length for a 2 HP motor
This is not long enough.
the well.
Any combination of sizes can be used,
provided that the total percentage of the length
of the two sizes of cable does not exceed
49M #12AWG
64M #8AWG
(44% of
Cable
Allowable
Cable)
Pump
Controls
2 HP (1.5 kw)
230V 1Ph Motor
Table IX , a total of 87m of
Table IX shows that
Table IX shows that the total
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