Article 501 through 503 form a trilogy. Art. 505 provides an alternative to Art. 501; Art. 506 provides an alternative to Art. 502 and 503. Between these two sets is Art. 504. It’s sandwiched there ...
Intrinsic safety (IS) is an electrical design approach that prevents explosions from occurring by ensuring that the energy transferred to a hazardous area is well below the energy required to initiate ...
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