This is a critical distinction because it means the requirements for the cable contained in raceway is different than cable supported by cable tray.
Type tc cable nec.
336 6 power and control tray cable.
It can be used when dropping out of cable tray to equipment or devices and also where dropping from tray to tray.
Cable tray is classified by the nec nfpa 70 the national electrical code as a support system and not as a raceway.
Tc cables are rated for 600 volts and can be used in industrial power or control circuits where flame.
The national electric code nec defines tray cable as.
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.
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.
Types se and use.
Generally speaking raceway completely encloses the cable inside of it.
Type tc tray cable nec article 336 power and control tray cable type tc is a factory assembly of two or more insulated conductors with or without associated bare or covered grounding conductors under a non metallic jacket.
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.
The intent of sec.
See the actual nec text at nfpa org for the complete code section.
Below is a preview of article 320.
340 6 underground feeder and branch circuit cable.
Power and control tray cable type tc is a factory assembly of two or more insulated conductors under a nonmetallic jacket sec.
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.
Ul stands for underwriter s laboratory and is an independent us testing organisation similar to the german vde.
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.
