Mixing Intrinsically Safe and Non-incendive field wiring
Mixing Intrinsically Safe and Non-incendive field wiring
(OP)
I am looking for a standard which outlines how the ratings for intrinsically safe circuits and non-incendive circuits are effected when the field wiring for both types of circuits are routed together in the same cable tray without any separation or metal-sheathed cables.





RE: Mixing Intrinsically Safe and Non-incendive field wiring
http://www.ul.com/regulators/is_circuits.pdf
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Mixing Intrinsically Safe and Non-incendive field wiring
“(1) Open wiring. Conductors and cables of intrinsically safe circuits not in raceways or cable trays shall be separated at least 50 mm (2 in.) and secured from conductors and cables of any nonintrinsically safe circuits.
Exception: Where either (1) all of the intrinsically safe circuit conductors are in Type MI, or MC cables or (2) all of the nonintrinsically safe circuit conductors are in raceways or
Type MI, or MC cables where the sheathing or cladding is capable of carrying fault current to ground.”
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RE: Mixing Intrinsically Safe and Non-incendive field wiring
RE: Mixing Intrinsically Safe and Non-incendive field wiring
RE: Mixing Intrinsically Safe and Non-incendive field wiring
RE: Mixing Intrinsically Safe and Non-incendive field wiring
CSA Std C22.2
API RP 14F
ISA 12.02.01
ISA 12.06.01
ISA 12.13.01
ISA RP 12.4
NFPA 70
UL 1604