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5 May, 04:39

An industrial system is rated at 600 v the system includes a partially exposed terminal block thats mounted on a bulkhead a new electrical apprentice who isnt considered to be qualified according to OSHA's standards approches the energized block the closest the apprentice should come to the block is?

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  1. 5 May, 06:28
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    10 ft or 3.048 m (for unqualified person)

    1.09 ft or 0.33 m (for qualified person)

    Explanation:

    OSHA has prescribed "Minimum Approach Distance - MAD" to ensure safety of personnel working with electrical power lines.

    For a unqualified person:

    The minimum approach distance is 10 ft or 3.048 m

    For a qualified person:

    For a voltage in the range of 300V to 750V (Phase to Ground or Phase to Phase) the minimum approach distance is 1.09 ft or 0.33 m

    Since 600V lies in the above range hence it is applicable on 600V.

    OSHA has developed a full list of minimum approach distance according to the level of voltages (50V to 72000V)
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