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Type NM-B (nonmetallic-sheathed cable)
Type NM-B (nonmetallic-sheathed cable)
Type NM-B (nonmetallic-sheathed cable)
Type NM-B (nonmetallic-sheathed cable)
Nonmetallic-Sheathed Cable Type NM-B
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Type NM-B (nonmetallic-sheathed cable)
Nonmetallic-Sheathed Cable Type NM-B
OVERVIEW
SPECIFICATIONS
CONSTRUCTION
PARAMETER
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Application
Type NM-B (nonmetallic-sheathed cable) may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors) as specified in the 2011 National Electrical Code. NM-B cable is primarily used in residential wiring as branch circuits for outlets, switches, and other loads. NM-B cable may be run in air voids of masonry block or tile walls where such walls are not wet or damp locations. Voltage rating for NM-B cable is 600 volts.
Standards:
Type NM-B cable complies with:
• ASTM B-3 and B-8
• UL Standard 83
• UL Standard 719
• Federal Specification A-A-59544
• National Electrical Code, NFPA 70. 2011 Edition
• RoHS/ REACH
Features
Nonmetallic-Sheathed Cable. 600 Volt.
Copper Conductors. Color-Coded Jacket.
Four Conductor Available With Two Neutrals.
Specifications
ROHS
ROHS
Low Voltage
Low Voltage
Working Temperature 90℃
Working Temperature 90℃
Flame Retardant
Flame Retardant
construction
Type NM-B cable is manufactured as 2, 3, or 4 conductor cable, with a bare ground wire. Copper conductors are annealed (soft) copper. Stranded conductors are compressed stranded. Conductor insulation is 90°C-rated polyvinyl chloride (PVC), nylon jacketed. Type NM-B is designed for Easier Pulling, Resulting in Easier installation. The cable jacket is color-coded for quick size identification; White - 14 AWG, Yellow - 12 AWG, Orange - 10 AWG, and Black - 8 AWG and 6 AWG.
1. Jacket:
PVC, flame retardant. 90℃.
2. Assembly:
the conductor laid parallel, with kraft paper tape wrapped.
3. Wrapping:
kraft paper tape over the grounding conductor
4. Core Jacket:
Nylon
5. Insulation:
PVC, type THHN.
6. Conductor
annealed copper, comply to ASTM B3
parameter
Type NM-B Cable
Conductor Ground Wire Approx. Cable Dimension (mils) Approx. Net Weight per 1000' (lbs) Allowable Ampacity+
Size (AWG) Number of Conductors Number of Strands Insulation Thickness (mils) Size (AWG) Number of Strands
TWO CONDUCTOR
14 2 1 19 14 1 360X162 57 15
12 2 1 19 12 1 410X179 82 20
10 2 1 24 10 1 494X210 124 30
8 2 7 35 10 1 612X269 186 40
6 2 7 35 10 1 683X304 225 55
THREE CONDUCTOR
14 3 1 19 14 1 307 74 15
12 3 1 19 12 1 347 107 20
10 3 1 24 10 1 422 164 30
8 3 7 35 10 1 565 253 40
6 3 7 35 10 1 650 357 55
4 3 7 46 8 1 814 560 70
2 3 7 46 8 1 952 816 95
FOUR CONDUCTOR
14 2/2 1* 19 14 1 336 91 15
14 4 1** 19 14 1 336 91 15
12 2/2 1* 19 12 1 381 132 20
12 4 1** 19 12 1 381 132 20
10 4 1 24 10 1 465 201 30
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