11-11. Selecting Extension Cord (Use Shortest Cord Possible)
Cord Lengths for 120 Volt Loads
If unit does not have GFCI receptacles, use
Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)*
Current | Load (Watts) | 4 |
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5 | 600 |
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| 350 | (106) | 225 (68) | 137 | (42) | 100 (30) |
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7 | 840 |
| 400 | (122) | 250 (76) | 150 (46) | 100 | (30) | 62 (19) | |
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10 | 1200 | 400 (122) | 275 (84) | 175 (53) | 112 (34) | 62 (19) | 50 (15) | |||
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15 | 1800 | 300 (91) | 175 (53) | 112 (34) | 75 (23) | 37 (11) | 30 (9) | |||
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20 | 2400 | 225 (68) | 137 (42) | 87 | (26) | 50 (15) | 30 | (9) |
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25 | 3000 | 175 (53) | 112 (34) | 62 | (19) | 37 (11) |
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30 | 3600 | 150 (46) | 87 | (26) | 50 | (15) | 37 (11) |
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35 | 4200 | 125 (38) | 75 | (23) | 50 | (15) |
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40 | 4800 | 112 (34) | 62 | (19) | 37 (11) |
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45 | 5400 | 100 (30) | 62 | (19) |
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50 | 6000 | 87 (26) | 50 | (15) |
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*Conductor size is based on maximum 2% voltage drop
Cord Lengths for 240 Volt Loads
If unit does not have GFCI receptacles, use
Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)*
Current | Load (Watts) | 4 | 6 |
| 8 | 10 | 12 | 14 | |
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5 | 1200 |
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| 700 | (213) | 450 | (137) | 225 (84) | 200 (61) |
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7 | 1680 |
| 800 (244) | 500 | (152) | 300 (91) | 200 (61) | 125 (38) | |
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10 | 2400 | 800 (244) | 550 (168) | 350 | (107) | 225 (69) | 125 (38) | 100 (31) | |
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15 | 3600 | 600 (183) | 350 (107) | 225 (69) | 150 (46) | 75 (23) | 60 (18) | ||
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20 | 4800 | 450 (137) | 275 (84) | 175 (53) | 100 (31) | 60 (18) |
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25 | 6000 | 350 (107) | 225 (69) | 125 (38) | 75 | (23) |
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30 | 7000 | 300 (91) | 175 (53) | 100 (31) | 75 | (23) |
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35 | 8400 | 250 (76) | 150 (46) | 100 (31) |
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40 | 9600 | 225 (69) | 125 (38) | 75 | (23) |
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45 | 10,800 | 200 (61) | 125 (38) |
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50 | 12,000 | 175 (53) | 100 (31) |
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*Conductor size is based on maximum 2% voltage drop
