Did you KNOW this about NM Cable?

Things to Consider when inspecting homes…check the attics, basements and so on…:slight_smile:

**[FONT=Times-Bold][size=2]334.80 Ampacity. **The ampacity of Types NM, NMC, and
NMS cable shall be determined in accordance with 310.15.
The ampacity shall be in accordance with the 60°C (140°F)
conductor temperature rating. The 90°C (194°F) rating
shall be permitted to be used for ampacity derating purposes,
provided the .nal derated ampacity does not exceed
that for a 60°C (140°F) rated conductor. The ampacity of
Types NM, NMC, and NMS cable installed in cable tray
shall be determined in accordance with 392.11.
Where more than two NM cables containing two or
more current-carrying conductors are bundled together and
pass through wood framing that is to be .re- or draftstopped
using thermal insulation or sealing foam, the allowable
ampacity of each conductor shall be adjusted in
accordance with Table 310.15(B)(2)(a).

334.30 Securing and Supporting. **Nonmetallic-sheathed
cable shall be supported and secured by staples, cable ties,
straps, hangers, or similar fittings designed and installed so
as not to damage the cable, at intervals not exceeding 1.4 m
(4 1/2"**)
and within 300 mm (12 in.) of every outlet box,
junction box, cabinet, or .tting. Flat cables shall not be
stapled on edge.
Sections of cable protected from physical damage by raceway
shall not be required to be secured within the raceway.

[FONT=Times-Bold][size=2]© Nonmetallic Boxes and Conduit Bodies**. **Nonmetallic
boxes and conduit bodies shall be suitable for the lowest
temperature-rated conductor entering the box. Where nonmetallic
boxes and conduit bodies are used with messenger
supported wiring, open wiring on insulators, or concealed
knob-and-tube wiring, the conductors shall enter the box
through individual holes. Where .exible tubing is used to
enclose the conductors, the tubing shall extend from the last
insulating support to not less than 6 mm (1.4 in.) inside the
box and beyond any cable clamp. Where nonmetallicsheathed
cable or multiconductor Type UF cable is used,
the sheath shall extend not less than 6 mm (1.4 in.) inside
the box and beyond any cable clamp. In all instances, all
permitted wiring methods shall be secured to the boxes.

*Exception: Where nonmetallic-sheathed cable or multiconductor
Type UF cable is used with single gang boxes
**not larger than a nominal size 57 mm × 100 mm (2 ****1/4 **in.
× 4 in.) mounted in walls or ceilings, and where the cable
is fastened within 200 mm (8 in.) of the box measured along
the sheath and where the sheath extends through a cable
**knockout not less than 6 mm (****1/4 **in.), securing the cable to
the box shall not be required. Multiple cable entries shall
be permitted in a single cable knockout opening.

Just some things to think about when doing your inspection…look around and be aware of what ya might see.