6-8. Selecting Extension Cord (Use Shortest Cord Possible)
Cord Lengths for 120 Volt Loads
YIf unit does not have GFCI receptacles, use
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| Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)* |
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Load (Watts) | 4 |
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| 8 | 10 | 12 |
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5 | 600 |
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| 350 | (106) | 225 (68) | 137 (42) |
| 100 (30) |
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7 | 840 |
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| 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
YIf unit does not have GFCI receptacles, use
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| Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)* |
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Current |
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Load (Watts) | 4 |
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| 8 | 10 | 12 |
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(Amperes) |
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5 | 1200 |
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| 700 | (213) | 450 (137) | 225 (84) |
| 200 (61) |
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7 | 1680 |
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| 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