Hobart 750 manual Connecting Gas/Air Supply, Electrical Service Guide

2-6. Connecting Gas/Air Supply

Use only clean and dry gas/air with 70 to 150 psi

1 Unit Gas Fitting (Female 1/4

(483 to 1034 kPa) pressure.

NPT)

	2	Quick Connect Gas Fitting
1	3	Standard Gas Fitting
	Obtain and install desired fitting.
	4	Hose
2	Obtain suitable hose according to
	installed fitting, and connect to fit-
	ting. Route hose to gas/air supply.
	Adjust gas/air pressure according
	to Section 3-2.
3	Y Incorrect plasma gas can
4	From Gas/Air Supply	cause torch and power
		source damage. Use only air
		or nitrogen for the plasma
		gas.

								Ref. 801 455
2-7. Electrical Service Guide
		Single Phase				Three Phase
Input Voltage	200		230	460	230		460		575
Input Amperes At Rated Output	42.3		36.8	18.4	18.4		9.2		7.4
Max Recommended Standard Fuse Rating In Amperes 1
Time-Delay 2	50		45	20	20		10		8
Normal Operating 3	60		60	25	25		15		10
Min Input Conductor Size In AWG/Kcmil	8		10	14	14		14		14
Max Recommended Input Conductor Length In Feet (Meters)	110		97	153	77		307		479
	(33)		(29)	(47)	(23)		(94)		(146)
Min Grounding Conductor Size In AWG/Kcmil	10		10	14	14		14		14

Reference: 1999 National Electrical Code (NEC)

1Consult factory for circuit breaker applications.

2“Time-Delay” fuses are UL class “RK5” .

3“Normal Operating” (general purpose – no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and above).

OM-279 Page 11