Page 45 - PHU_User Manual_EN_Rev A
P. 45
OPERATION
Wire Gauge Considerations
Background Before connecting the output terminals to a load,
the wire gauge of the cables should be considered.
It is essential that the current capacity of the load
cables is adequate. The rating of the cables must
equal or exceed the maximum current rated
output of the instrument.
Recommended Wire Gauge Nominal Cross Maximum
wire gauge Section Current
20 0.5 9
18 0.75 11
18 1 13
16 1.5 18
14 2.5 24
12 4 34
10 6 45
8 10 64
6 16 88
4 25 120
2 32 145
1 50 190
00 70 240
000 95 290
0000 120 340
The maximum operation current depends on the
maximum allowable temperature of the insulation
on the cable.
Under this condition, above table figures the
maximum current that insulation’s temperature
rise should be under 60 degree and ambient
temperature must be less than 30 degrees.
To minimize noise pickup or radiation, the load
wires and remote sense wires should be twisted-
pairs of the shortest possible length. Shielding of
the sense leads may be necessary in high noise
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