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1910.306(h)(4) Power Supply Circuits and Receptacles for Portable Electric Equipment

OSHA 1910 General Industry > S Electrical > 1910.306 Specific Purpose Equipment and Installations > 1910.306(h) Electrolytic Cells > 1910.306(h)(4) Power Supply Circuits and Receptacles for Portable Electric Equipment

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1910.306(h)(4)(i)

Circuits supplying power to ungrounded receptacles for hand-held, cord- and plug-connected equipment shall meet the following requirements:

1910.306(h)(4)(i)(A)

The circuits shall be electrically isolated from any distribution system supplying areas other than the cell line working zone and shall be ungrounded;

1910.306(h)(4)(i)(B)

The circuits shall be supplied through isolating transformers with primaries operating at not more than 600 volts between conductors and protected with proper overcurrent protection;

1910.306(h)(4)(i)(C)

The secondary voltage of the isolating transformers may not exceed 300 volts between conductors; and

1910.306(h)(4)(i)(D)

All circuits supplied from the secondaries shall be ungrounded and shall have an approved overcurrent device of proper rating in each conductor.

1910.306(h)(4)(iii)

Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary:

1910.306(h)(4)(iii)(A) Shall Have a Distinctive Configuration

1910.306(h)(4)(iii)(B) Shall Be Distinctively Marked; And

1910.306(h)(4)(iii)(C)

May not be used in any other location in the facility.

Receptacles and their mating plugs for ungrounded equipment may not have provision for a grounding conductor and shall be of a configuration that prevents their use for equipment required to be grounded.

Related Code Sections

1910.306(h)(4) Electrical, Power Supply Circuits and Receptacles for Portable Electric Equipment

Circuits supplying power to ungrounded receptacles for hand-held, cord- and plug-connected equipment shall meet the following requirements ...

1910.306(h)(4)(ii) Electrical,

Receptacles and their mating plugs for ungrounded equipment may not have provision for a grounding conductor and shall be of a configuration ...

1910.306(h)(4)(i)(C) Electrical,

The secondary voltage of the isolating transformers may not exceed 300 volts between conductors ...