schwarz633
Member
- Location
- WI
I have an XP enclosure on a machine in a C1D1 area. There are Turck isolating switching amplifiers with IS inputs in the XP enclosure for the guard door switches. The plan is to run a common M12 (4) conductor sensor cable (blue) from each door switch into the XP enclosure. I'm hoping to pass multiple cables through a single sealing fitting without removing the jacket from the cables. Inside the XP enclosure the jackets will be removed and each cable will be sealed with a 3" piece of adhesive lined heat shrink tubing. I'm hoping this will comply with the exception listed under NEC 501.15 (D) (2):
Exception: Multiconductor cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be permitted to be considered as a single conductor by sealing the cable in the conduit within 450 mm (18 in.) of the enclosure and the cable end within the enclosure by an approved means to minimize the entrance of gases or vapors and prevent the propagation of flame into the cable core, or by other approved methods. For shielded cables and twisted pair cables, it shall not be required to remove the shielding material or separate the twisted pair.
Any opinions on this?
Exception: Multiconductor cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be permitted to be considered as a single conductor by sealing the cable in the conduit within 450 mm (18 in.) of the enclosure and the cable end within the enclosure by an approved means to minimize the entrance of gases or vapors and prevent the propagation of flame into the cable core, or by other approved methods. For shielded cables and twisted pair cables, it shall not be required to remove the shielding material or separate the twisted pair.
Any opinions on this?