The subject installation involves IS rated instruments that are physically located in a Class 1 Div 2 area. These instruments will be wired to a PLC panel that is outfitted with a Z-Purge system. The proposed wiring installation method is to run wiring between the PLC panel and the IS rated instruments. Can you advise as to which of the following methods are acceptable? If the answer is that none of the below are acceptable, then please suggest a solution that preferably avoids the needs for barriers.
1. EYS fittings will be installed at the location for each IS instrument and similarly for the conduit exiting the PLC panel. The fittings would be poured/sealed. Does the Z-Purge on the PLC panel eliminate the need for the sealed fittings?
2. IS Barriers are installed within the PLC panel for each IS instrument. No seals are used for the conduit and wiring.
3. Z-Purge on the PLC panel is sufficient. Seals or IS Barriers are not needed.
Thank you,
KCCA
1. EYS fittings will be installed at the location for each IS instrument and similarly for the conduit exiting the PLC panel. The fittings would be poured/sealed. Does the Z-Purge on the PLC panel eliminate the need for the sealed fittings?
2. IS Barriers are installed within the PLC panel for each IS instrument. No seals are used for the conduit and wiring.
3. Z-Purge on the PLC panel is sufficient. Seals or IS Barriers are not needed.
Thank you,
KCCA