Card 15 / 30: Define the Limited Approach Boundary
A) An approach limit at a distance from an exposed live part within which a shock hazard exists. Unqualified workers and anything conductive that they are carrying must stay beyond this boundary.
B) The closest a qualified worker can get to exposed, energized conductors or parts if he/she is wearing rubber insulating PPE, using insulated tools, or has energized parts guarded for the voltage.
C) The same as making contact. No part of the body can cross; only hands in rubber insulating PPE rated for the voltage, voltage rated tools, or live-line tools
D) The distance from exposed, energized conductors that would result in a 2nd degree burn to unprotected skin.

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