Lengths in BOLD only meet the US National Electrical
Code ampacity requirements for individual conductors
60 °C or 75 °C in free air or water, not in magnetic
enclosures, conduit or direct buried.
Lengths NOT in bold meet the NEC ampacity
requirements for either individual conductors or jacketed
60 °C or 75 °C cable and can be in conduit or direct
buried. Flat molded and web/ribbon cable are considered
If any other cable is used, the NEC and local codes
should be observed.
Cable lengths in Tables 11 & 11A allow for a 5% voltage
drop running at maximum nameplate amperes. If 3%
voltage drop is desired, multiply Table 11 and 11A lengths
by 0.6 to get maximum cable length.
The portion of the total cable length, which is between the
supply and single-phase control box with a line contactor,
should not exceed 25% of total maximum allowable to
ensure reliable contactor operation. Single-Phase control
boxes without line contactors may be connected at any
point in the total cable length.
Tables 11 & 11A is based on copper wire. If aluminum
wire is used, it must be two sizes larger than copper wire
and oxidation inhibitors must be used on connections.
EXAMPLE: If Table 11 & 11A call for #12 copper wire,
#10 aluminum wire would be required.
Contact Franklin Electric for 90 °C cable lengths. See
pages 15, 48, and 49 for applications using 230 V motors
on 208 V power systems.