NFPA 70E Article 100 Definitions.

The limited and restricted approach boundaries relate to electric shock hazards.
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The limited and restricted approach boundaries relate to electric shock hazards.

Limited and restricted approach boundaries differ from the arc flash boundary. The limited and restricted approach boundaries relate to electric shock hazards whereas the arc flash boundary is all about an arc flash hazard.

The following definitions can be found in Article 100 of NFPA 70E:

Below is a sample of NFPA 70E. For the complete section, see the actual NFPA 70E text at NFPA.ORG. Once there, click on the free access link to NFPA 70E.

Boundary, Limited Approach. An approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists.

Boundary, Restricted Approach. An approach limit at a distance from an exposed energized electrical conductor or circuit part within which there is an increased likelihood of electric shock, due to electrical arc-over combined with inadvertent movement.

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NFPA 70E Article 100 Definitions.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Which of the following is true regarding boundaries?

A: An arc flash suit is required outside all boundary types.
B: A limited approach boundary is an approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists.
C: An arc flash boundary is in place to ensure the worker is not exposed to dangerous voltage.
D: A restricted approach boundary is an approach limit at a distance from an exposed energized electrical conductor or circuit part within which an arc flash hazard exists.
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