340 6 underground feeder and branch circuit cable.
Type tc cable nec.
The national electric code nec defines tray cable as.
Based on the the national electrical code nec also referred to as nfpa 79 the safety standard prevalent in the usa for electrical installations the underwriter s laboratory defines standards for electrical components and their fields of application.
Once there click on their link to free access to the 2017 nec edition of nfpa 70.
336 6 power and control tray cable.
A factory assembly of two or more insulated conductors with or without associated bare or covered grounding conductors under a nonmetallic sheath for installation in cable trays in raceways or where supported by a messenger wire.
Types se and use.
Type tc power and control tray cable is a factory assembly of two or more insulated conductors with or without associated bare or covered grounding conductors under a nonmetallic sheath approved for installation in cable trays in raceways or where supported by a messenger wire.
See the actual nec text at nfpa org for the complete code section.
A common problem the update addresses is that fittings that pass the flexible cord listing requirements but not the tray cable listing requirements are being used with type tc tray cables nrtls list tray cable fittings and flexible cord fittings to the ul514b conduit tubing and cable fittings standard which requires different pulls test for the fittings used with flexible cord and the.
336 10 7 of the 2014 national electrical code nec and its corresponding exception is to make it clear that cable with only a tc rating cannot be run unprotected outside a raceway or cable tray.
Generally speaking raceway completely encloses the cable inside of it.
The cable that complies with the crush and impact requirements of type mc cable and is identified with the marking tc er the cable is secured at intervals not exceeding 1 8 m 6 ft.
Cable tray is classified by the nec nfpa 70 the national electrical code as a support system and not as a raceway.
This is a critical distinction because it means the requirements for the cable contained in raceway is different than cable supported by cable tray.
Power and control tray cable type tc is a factory assembly of two or more insulated conductors under a nonmetallic jacket sec.
Tc cables are rated for 600 volts and can be used in industrial power or control circuits where flame.
Below is a preview of article 320.
Service entrance cable is a single or multiconductor assembly with or without an overall covering used primarily for services sec.
Equipment grounding for the utilization equipment is provided by an equipment grounding conductor within the cable.
The intent of sec.
