Mc Cable Support Distance

Wiring method is conduit tubing type ac cable type mc cable type mi cable nonmetallic sheathed cable or other cables a box or conduit body shall be installed at each conductor splice point outlet point switch point junction point termination point or pull point unless otherwise permitted in 300 15 a through l.

Mc cable support distance.

1 fished through concealed spaces in finished buildings or structures where support is impracticable or 2 not more than 6 ft long from the last point of cable support to the point of connection to luminaires or other electrical equipment within an accessible ceiling. Nonmetallic sheathed cable shall be supported and secured by staples. They also must be secured within 12 inches of an electrical box that includes a cable clamp or within eight inches of a box or enclosure without a cable clamp. Or straps hangers or similar fittings designed and installed so as not to damage the cable at intervals not exceeding 1 4 m 4 ft and within 300 mm 12 in of every cable entry into enclosures such as outlet.

The acceptance and use of the eia tia 569 commercial building standard for telecommunications pathways and spaces by architects and engineers has proven the importance of a carefully designed and maintained cable support system. This new 2017 code language also allows the electrician to install mc cable on the underside of floor and ceiling joists assuming the electrician supports the cable at every provided joist. Size of conductors 14 awg to 1 awg 18 awg 2000 kcmil 14 awg 6 awg. Type ac cable interlocked armor type mc cable interlocked armor type mc cable with armor bond mci a 1 number of conductors limited to no more than 4 conductors plus an equipment grounding conductor.

Runs of nm cable must be supported at least every 54 inches. This standard mandates performance tests more stringent than those required for type mc cable. Keep in mind that support does not always mean fastening the cable to framing. In length from the last point of cable support to the point of connection to a luminaire or other.

Cable ties listed and identified for securement and support. Mc cable must be supported every 6 ft. Type mc cable can be unsupported where the cable is. In order to be labeled for division 1 hazardous locations type mc hl by ul the c l x cables must meet the following criteria.

Mc cables may be unsupported when 1 fished through concealed spaces in finished buildings 2 when not more than 6 ft. Mc cable is considered supported when run through metal or wooden framing members. This is also new for 2017 as permission for this method of installation did not exist prior to the 2017 code cycle. No limit on number of conductors.

There are six major types of cable supports. General cable support.