Circuit Integrity Cable Considerations
Termination points and junction boxes, in other words the entire circuit, must be completely protected. Often, termination points are left out, providing a weak link. Therefore, some enclosures are needed to be used in conjunction with MI cables. One may run MI cable into a box in an electrical room. However, just because that room may be a "service room" and may be subject to compartmentalization (fire protection), this does not mean one no longer requires a rated box or wrap around the electrical outlet box or junction box where the wiring is terminated because that box may be disabled as a result of a fire within the room. The probability of electrical fires are a strong motivating factor for compartmetalisation to begin with. The cable may thus be operable but the circuit as a whole may be defeated because the junction box would not have been protected. Such omissions are not entirely uncommon in the field.
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