Miller Electric Big Blue 300 Owner's Manual page 63

11-11. Selecting Extension Cord (Use Shortest Cord Possible)
Cord Lengths for 120 Volt Loads
If unit does not have GFCI receptacles, use GFCI-protected extension cord.
Current
Load (Watts)
(Amperes)
5
7
10 1200
15 1800
20 2400
25 3000
30 3600
35 4200
40 4800
45 5400
50 6000
*Conductor size is based on maximum 2% voltage drop
Cord Lengths for 240 Volt Loads
If unit does not have GFCI receptacles, use GFCI-protected extension cord.
Current
Load (Watts)
(Amperes)
5 1200
7 1680
10 2400
15 3600
20 4800
25 6000
30 7000
35 8400
40 9600
45 10,800
50 12,000
*Conductor size is based on maximum 2% voltage drop
Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)*
4
600
840
400 (122)
300 (91)
225 (68)
175 (53)
150 (46)
125 (38)
112 (34)
100 (30)
87 (26)
Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)*
4
800 (244)
600 (183)
450 (137)
350 (107)
300 (91)
250 (76)
225 (69)
200 (61)
175 (53)
6 8
350 (106)
400 (122) 250 (76)
275 (84) 175 (53)
175 (53) 112 (34)
137 (42) 87 (26)
112 (34) 62 (19)
87 (26) 50 (15)
75 (23) 50 (15)
62 (19) 37 (11)
62 (19)
50 (15)
6 8
700 (213)
800 (244) 500 (152)
550 (168) 350 (107)
350 (107) 225 (69)
275 (84) 175 (53)
225 (69) 125 (38)
175 (53) 100 (31)
150 (46) 100 (31)
125 (38) 75 (23)
125 (38)
100 (31)
10 12
225 (68) 137 (42)
150 (46) 100 (30)
112 (34) 62 (19)
75 (23) 37 (11)
50 (15) 30 (9)
37 (11)
37 (11)
10 12
450 (137) 225 (84)
300 (91) 200 (61)
225 (69) 125 (38)
150 (46) 75 (23)
100 (31) 60 (18)
75 (23)
75 (23)
OM-4433 Page 59
14
100 (30)
62 (19)
50 (15)
30 (9)
14
200 (61)
125 (38)
100 (31)
60 (18)