ELECTRICAL SAFETY DESIGN

Wiring Design and Protection - Grounded and Grounding Conductors

The correct polarity between the ungrounded (hot) and grounded (neutral) conductors when using plugs, receptacles, and connectors is important because incorrect polarity can create dangerous situations. There are two basic guidelines:

No grounded conductor may be attached to any terminal or lead which would reverse designated polarity

A grounding terminal or grounding-type device on a receptacle, cord connector, or attachment plug may not be used for purposes other than grounding.

Many pieces of equipment will operate properly even though the supply wires are not connected in the order designated by design or the manufacturer. Improper connection is most prevalent on the smaller branch circuit typically associated with standard 120 volt receptacle outlets, lighting fixtures, and cord- and plug-connected equipment.

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