We have a 6c-16AWG, CMP, CL2R, FEP/FEP, 300V, cUL, cable installed outdoors in covered ladder type instrumentation cable tray and is routed through conduit on tray take off to terminations. The weather is around +35 deg c to -40 deg c worst case.
1. Can we install CMP cables in cable trays? I read some white papers from manufacturers that says it can be. CEC 2018 Table 19 also allows it (in “raceways” with no exceptions to cable tray)
2. On outdoor environment at freezing temperatures, will it matter if it is in covered cable tray or conduit, as in both cases, cable will still be subjected to below rated operating temperature? covered trays also offer mechanical protection but do not mitigate the freezing temperature. UL standardized the minimum operating temperature for this cable as -20 deg C (unless otherwise marked on the cable). One may argue that if they it is in conduit, the cable will not be subjected to breaks even at temperatures lower than -20 Deg C. However, I would see that the cable may break by itself without any impact due to -40 Dec C.
I would like to obtain some advise, as this falls in the cracks but I can be wrong.
1. Can we install CMP cables in cable trays? I read some white papers from manufacturers that says it can be. CEC 2018 Table 19 also allows it (in “raceways” with no exceptions to cable tray)
2. On outdoor environment at freezing temperatures, will it matter if it is in covered cable tray or conduit, as in both cases, cable will still be subjected to below rated operating temperature? covered trays also offer mechanical protection but do not mitigate the freezing temperature. UL standardized the minimum operating temperature for this cable as -20 deg C (unless otherwise marked on the cable). One may argue that if they it is in conduit, the cable will not be subjected to breaks even at temperatures lower than -20 Deg C. However, I would see that the cable may break by itself without any impact due to -40 Dec C.
I would like to obtain some advise, as this falls in the cracks but I can be wrong.
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