Cable insulation visibility

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Isaiah

Senior Member
Location
Baton Rouge
Occupation
Electrical Inspector
Is there a section in the NEC that states cable voltage insulation level (e.g 600V) must be visible on the cable jacket where the circuit terminates? Such as at a motor termination box or control panel?


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Isaiah said:
Is there a section in the NEC that states cable voltage insulation level (e.g 600V) must be visible on the cable jacket where the circuit terminates? Such as at a motor termination box or control panel?


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Cable or individual conductors? What type of cable? NM has requirements for surface markings MC or AC does not.
 
infinity said:
Cable or individual conductors? What type of cable? NM has requirements for surface markings MC or AC does not.
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This is for multi conductor terms at motors termination boxes. Cable is mostly TC-ER, XHHW-2, rated 600V


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The markings on the tray cable jacket are to be every 24". There is no requirement that the marking be visible at the points of termination.
 
don_resqcapt19 said:
The markings on the tray cable jacket are to be every 24". There is no requirement that the marking be visible at the points of termination.
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Thanks Don. Can you please reference the NEC section where this is found?


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Dale001289 said:
Look at 310.120(B)(1) - 2017 NEC
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That covers markings on conductors. I thought this question was about tray cable, and nothing in the code covers the markings on tray cable. The only thing the code says about markings on tray cable is that thermocouple type tray cable shall not have a voltage marking. The voltage and other marking requirements for tray cable are only found in UL 1277, Electrical Power and Control Tray Cables.
 
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