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6. If you are using an extension cord outdoors, make sure it is marked with the suffix “W-
A” (“W” in Canada) to indicate it is acceptable for outdoor use.
7. Make sure your extension cord is properly wired and in good electrical condition.
Always replace a damaged extension cord or have it repaired by a qualified electrician
before using it.
8. Protect your extension cords from sharp objects, excessive heat, and damp or wet
areas.
Table A
RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*
(120 VOLT)
NAMEPLATE
AMPERES
(At Full Load)
EXTENSION CORD LENGTH
25
Feet
50
Feet
75
Feet
100
Feet
150
Feet
0 – 2.0 18 18 18 18 16
2.1 – 3.4 18 18 18 16 14
3.5 – 5.0 18 18 16 14 12
5.1 – 7.0 18 16 14 12 12
7.1 – 12.0 16 14 12 10 -
12.1 – 16.0 14 12 10
--
16.1 – 20.0 12 10 - - -
* Based on limiting the line voltage drop to five volts at 150% of the rated amperes.
SYMBOLOGY
Table B
(1)