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// CODE SNIPPET

1910.254(c)(3) Supply Connections and Conductors

OSHA 1910 General Industry > Q Welding, Cutting, and Brazing > 1910.254 Arc Welding and Cutting > 1910.254(c) Installation of Arc Welding Equipment - > 1910.254(c)(3) Supply Connections and Conductors
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1910.254(c)(3)(i)

A disconnecting switch or controller shall be provided at or near each welding machine which is not equipped with such a switch or controller mounted as an integral part of the machine. The switch shall be in accordance with Subpart S of this part. Overcurrent protection shall be provided as specified in Subpart S of this part. A disconnect switch with overload protection or equivalent disconnect and protection means, permitted by Subpart S of this part, shall be provided for each outlet intended for connection to a portable welding machine.

1910.254(c)(3)(iii)

For groups of welding machines, the rated current-carrying capacity of conductors may be less than the sum of the rated primary currents of the welding machines supplied. The conductor rating shall be determined in each case according to the machine loading based on the use to be made of each welding machine and the allowance permissible in the event that all the welding machines supplied by the conductors will not be in use at the same time.

1910.254(c)(3)(iv)

In operations involving several welders on one structure, d.c. welding process requirements may require the use of both polarities; or supply circuit limitations for a.c. welding may require distribution of machines among the phases of the supply circuit. In such cases no load voltages between electrode holders will be 2 times normal in d.c. or 1, 1.41, 1.73, or 2 times normal on a.c. machines. Similar voltage differences will exist if both a.c. and d.c. welding are done on the same structure.

1910.254(c)(3)(iv)(A)

All d.c. machines shall be connected with the same polarity.

1910.254(c)(3)(iv)(B)

All a.c. machines shall be connected to the same phase of the supply circuit and with the same instantaneous polarity.

1910.254(c)(3)(ii)

For individual welding machines, the rated current-carrying capacity of the supply conductors shall be not less than the rated primary current of the welding machines.

Related Code Sections


1910.254(c)(3) Welding, Cutting, and Brazing, Supply Connections and Conductors
the sum of the rated primary currents of the welding machines supplied. The conductor rating shall be determined in each case according to the machine ...
OSHA 1910 General Industry > Q Welding, Cutting, and Brazing > 1910.254 Arc Welding and Cutting > 1910.254(c) Installation of Arc Welding Equipment - > 1910.254(c)(3) Supply Connections and Conductors
1910.254(c)(3)(i) Welding, Cutting, and Brazing,
of this part, shall be provided for each outlet intended for connection to a portable welding machine ...
OSHA 1910 General Industry > Q Welding, Cutting, and Brazing > 1910.254 Arc Welding and Cutting > 1910.254(c) Installation of Arc Welding Equipment - > 1910.254(c)(3) Supply Connections and Conductors > 1910.254(c)(3)(i)
1910.304(g)(4) Electrical, Grounding Connections
For a grounded system, a grounding electrode conductor shall be used to connect both the equipment grounding conductor and the grounded circuit ...
OSHA 1910 General Industry > S Electrical > 1910.304 Wiring Design and Protection > 1910.304(g) Grounding > 1910.304(g)(4) Grounding Connections
1910.304(g)(4)(i) Electrical,
For a grounded system, a grounding electrode conductor shall be used to connect both the equipment grounding conductor and the grounded circuit ...
OSHA 1910 General Industry > S Electrical > 1910.304 Wiring Design and Protection > 1910.304(g) Grounding > 1910.304(g)(4) Grounding Connections > 1910.304(g)(4)(i)
1910.331(a)(2) Electrical, Wiring for Connection to Supply
Installations of conductors that connect to the supply of electricity; and ...
OSHA 1910 General Industry > S Electrical > 1910.331 Scope > 1910.331(a) Covered Work by Both Qualified and Unqualified Persons > 1910.331(a)(2) Wiring for Connection to Supply
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