Lincoln Electric SVM133-B service manual Machine Grounding, Auxiliary Power Receptacles

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INSTALLATION

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MACHINE GROUNDING

Because this portable engine driven welder creates its own power, it is not necessary to connect its frame to an earth ground, unless the machine is connected to premises wiring (home, shop, etc.).

To prevent dangerous electric shock, other equipment powered by this engine driven welder must:

a)be grounded to the frame of the welder using a grounded type plug,

or

b) be double insulated.

NOTE: The two 120VAC outlets of the 120/240VAC receptacle cannot be paralleled. They are on two dif- ferent phases.

The auxiliary power receptacles should be used with only three-wire, grounded type plugs or approved dou- ble-insulated tools with two-wire plugs. The current rat- ing of any plug used with the system must be at least equal to the current-carrying capacity of the associated receptacle. An optional power plug kit is available. See the Accessories section.

STANDBY POWER CONNECTIONS

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When this welder is mounted on a truck or trailer, its frame must be securely connected to the metal frame of the vehicle. When connected to premises wiring such as that in a home or shop, its frame must be con- nected to the system earth ground. See further con- nection instructions in the section “Standby Power Connections” as well as the article on grounding in the latest U.S. National Electrical Code and the local code.

In general, if the machine is to be grounded, it should be connected with a #8 or larger copper wire to a solid earth ground such as a metal water pipe going into the ground for at least ten feet and having no insulated joints or to the metal framework of a building that has been effectively grounded. The U.S National Electrical Code lists a number of alternate means of grounding electrical equipment. A machine grounding stud marked with the symbol is provided on the front of the welder.

AUXILIARY POWER RECEPTACLES

The Commander 400 can produce 10,000 watts of 60 Hz, single-phase auxiliary power. (The rating in watts is equivalent to volt-amperes at unity power factor.) The output voltage is within ±10% at all loads up to the rated capacity.

The following receptacles are provided:

•Two 15 amp-120VAC duplex GFCI receptacles (5-15R)

•One 50 amp-120/240VAC receptacle (14-50R)

The 50 amp receptacle has a maximum permissible output of 44 amps. However, it can be split to power two separate, single-phase 120VAC branch circuits each capable of 44 amps output.

The Commander 400 is suitable for temporary, standby or emergency power using the engine manu- facturer’s recommended maintenance schedule.

The Commander 400 can be permanently installed as a standby power unit for 240 volt 3-wire, 44 ampere service. Connections must be made by a licensed electrician who can determine how the 120/240 VAC power can be adapted to the particular installation and comply with all applicable electrical codes. The follow- ing information can be used as a guide by the electri- cian for most applications. Refer to the connection diagram shown in Figure A.2.

1.Install the double-pole, double-throw switch between the power company meter and the premises discon- nect.

The switch rating must be the same or greater than the customer’s premises disconnect and service over current protection.

2.Take the necessary steps to assure the load is limit- ed to the capacity of the Commander 400 by installing a 45 amp, 240 VAC double-pole circuit breaker. Maximum rated load for each leg of the 240 VAC auxiliary is 45 amperes. Loading above the rated output will reduce output voltage below the allowable -10% of rated voltage, which may damage appliances or other motor-driven equipment and may result in overheating of the Commander 400 engine.

3.Install a 50 amp 120/240 VAC plug (NEMA Type 14- 50) to the double-pole circuit breaker using No. 6, 4 conductor cable of the desired length. (The 50 amp, 120/240 VAC plug is available in the optional K802R plug kit.) See the Accessories section.

4.Plug this cable into the 50 ampere 120/240 volt receptacle on the Commander 400 case front.

COMMANDER 400