Appendix i: input wiring requirements – Thermal Dynamics (a Thermadyne Company) Merlin 3000 User Manual
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Manual 0-2533
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APPENDIX
APPENDIX I: INPUT WIRING REQUIREMENTS
In p u t
P o w er In p u t
C u r r en t
S u g g e st ed S iz es ( S ee N o te s)
V o lta g e
F r e q .
3- P h
3- P h
F u se ( A m p s)
W ir e (A W G )
W ir e (C an ad a)
( V o lt s)
( H z )
( kV A )
( A m p s )
3- P h
3- P h
3- P h
200
50/60
34
98
110
A W G 2
2
208
50/60
34
95
110
A W G 2
2
220
50/60
34
89
100
A W G 2
2
230
50/60
34
85
100
A W G 4
2
380
50/60
34
51
60
A W G 6
6
415
50/60
34
47
60
A W G 8
6
460
50/60
34
42
50
A W G 8
6
506
50/60
34
40
45
A W G 8
6
575
50/60
34
34
40
A W G 8
6
Li n e V o l tages w i th S ugges ted C i r c ui t P r otec ti on an d W i r e S i z es
B as ed on N ati ona l E l ec tr i c C ode and C ana di an E l ec tr i c al C ode
NOTES
Refer to Local and National Codes or local authority having jurisdiction for proper wiring requirements.
Cable size is de-rated based on the Duty Cycle of the equipment.
The suggested sizes are based on flexible power cable with power plug installations. For hard-wired installations
refer to local or national codes.
Cable conductor temperature used is 167° F (75° C).
An energy limiting fuse UL Class RK-1 (examples: BUSS LPS/LPN-RK or Gould-Shawmut AZK-A6K) should be
used to minimize damage to Plasma Cutting, Welding or power distribution equipment.
NEVER
use replaceable element fuses like UL Class H, or "one-time" fuses like UL Class K5.