|
Extruded polytetraflu- oroethylene — flexible stranding 26-36 (AWG silver or nickel- coated copper) |
PTFF |
Extruded polytetraflu- oroethylene |
18-14 0.51 |
20 |
None |
I50°C 302°F |
Fixture wiring (silver or nickel-coated copper) |
|
Heat-resistant rubber- covered fixture wire — solid or 7-strand |
RFH-1 |
Heat-resistant rubber |
18 0.38 |
15 |
Nonmetallic covering |
75°C I67°F |
Fixture wiring — limited to 300 volts |
|
Heat-resistant rubber- covered fixture wire — solid or 7-strand |
RFH-2 |
Heat-resistant rubber Cross- linked synthetic polymer |
18-16 0.76 |
30 |
None or non- metallic covering |
75°C 167°F |
Fixture wiring |
|
Heat-resistant cross-linked synthetic polymer-insu- lated fixture wire — solid or 7- strand |
RFHH-2* RFHH-3* |
Cross-linked synthetic polymer |
18-16 0.76 18-16 1.14 |
30 45 |
None or non- metallic covering |
90°C 194°F |
Fixture wiring — |
|
Silicone insulated fixture wire 7-strand |
SF-1 |
Silicone rubber |
18 0.38 |
15 |
Nonmetallic covering |
200°C 392°F |
Fixture wiring — limited to 300 volts |
|
Silicone insulated fixture wire 7-strand |
SF-2 |
Silicone rubber |
18-12 0.76 10 1.14 |
30 45 |
Nonmetallic covering |
200°C 392°F |
Fixture wiring |
|
Silicone insulated fixture wire stranding |
SFF-1 |
Silicone rubber |
18 0.38 |
15 |
Nonmetallic covering |
150°C 302°F |
Fixture wiring — limited to 300 volts |
|
Silicone insulated fixture wire stranding |
SFF-2 |
Silicone rubber |
18-12 0.76 10 1.14 |
30 45 |
Nonmetallic covering |
150°C 302°F |
Fixture wiring |
|
Thermoplastic covered fixture wire — solid or 7-strand |
TP* |
Thermoplastic |
18-16 0.76 |
30 |
None |
60°C I40°F |
Fixture wiring |
|
Thermoplastic covered fixture wire — flexible stranding |
ypp* |
Thermoplastic |
18-16 0.76 |
30 |
None |
60°C 140°F |
Fixture wiring |
(Continues)
Table 402.3 Continued
|
Name |
Type Letter |
Insulation |
Thickness of Insulation |
Outer Covering |
Maximum Operating Temperature |
Application Provisions |
|
|
Name |
Type Letter |
Insulation |
AWG mm |
mils |
Outer Covering |
Maximum Operating Temperature |
Application Provisions |
|
Heat-resistant thermoplastic covered fixture wire — solid or 7- strand |
TFN* |
Thermoplastic |
18-16 0.38 |
15 |
Nylon-jacketed or equivalent |
90°C 194°F |
Fixture wiring |
|
Heat-resistant thermoplastic covered fixture wire — flexible stranded |
TFFN* |
Thermoplastic |
18-16 0.38 |
15 |
Nylon-jacketed or equivalent |
90°C 194°F |
Fixture wiring |
|
Cross-linked polyolefin insulated fixture wire — solid or 7- strand |
XF* |
Cross-linked polyolefin |
18-14 0.76 12-10 1.14 |
30 45 |
None |
150°C 302°F |
Fixture wiring — limited to 300 volts |
|
Cross-linked polyolefin insulated fixture wire — flexible stranded |
XFF* |
Cross-linked polyolefin |
18-14 0.76 12-10 1.14 |
30 45 |
None |
150°C 302°F |
Fixture wiring — limited to 300 volts |
|
Modified ETFE — solid or 7- strand |
ZF |
Modified ethylene tetrafluoro- ethylene |
18-14 0.38 |
15 |
None |
150°C 302°F |
Fixture wiring |
|
Flexible stranding |
ZFF |
Modified ethylene tetrafluoro- ethylene |
18-14 0.38 |
15 |
None |
150°C 302°F |
Fixture wiring |
|
High temp. modified ETFE — solid or 7-strand |
ZHF |
Modified ethylene tetrafluoro- ethylene |
18-14 0.38 |
15 |
None |
200°C 392°F |
Fixture wiring |
*Insulations and outer coverings that meet the requirements of flame retardant, limited smoke, and are so listed shall be permitted to be marked for limited smoke after the Code type designation.
402.5 Allowable Ampacities for Fixture Wires. The al- lowable ampacity of fixture wire shall be as specified in Table 402.5.
No conductor shall be used under such conditions that its operating temperature exceeds the temperature specified in Table 402.3 for the type of insulation involved.
FPN: See 310.10 for temperature limitation of conductors.