Appendix 1: input wiring requirements – Tweco 1000 Merlin(Dec2004) User Manual
Page 59
Manual 0-2708
A-1
APPENDIX
APPENDIX 1: INPUT WIRING REQUIREMENTS
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.
Input
Power Input
Current
Suggested Sizes (See Notes)
Voltage
Freq.
3-Ph
3-Ph
Fuse (Amps)
Wire (AWG)
Wire (Canada)
(Volts)
(Hz)
(kVA)
(Amps)
3-Ph
3-Ph
3-Ph
208
50/60
23.4
65
90
2
2
220
50/60
24
63
90
2
2
230
50/60
24.7
62
80
2
2
240
50/60
24.9
60
80
2
4
380
50/60
24.4
37
50
6
6
415
50/60
24.4
34
50
6
8
460
50/60
24.7
31
45
6
8
575
Requires Transformer Module
Line Voltages with Suggested Circuit Protection and Wire Sizes
Based on National Electric Code and Canadian Electrical Code