FIXTURE WIRES

70-323 (b) Shields. Cables operated at over 2000 volts shall be shielded. Shielding insulation. shall be for the purpose of confining the voltage stresses to the (c) Equipment Grounding Conductor(s). Equipment grounding conductor(s) shall be provided. The total area shall not be less than that of the size of the equipment grounding conductor required in Section 250-95. 400-32. Shielding. All shields shall be grounded. 400-33. Grounding. Grounding conductors shall be connected in accordance with Part K of Article 250. 400-34. Minimum Bending Radii. The minimum bending radii for portable cables during installation and handling in service shall be adequate to prevent damage to the cable. 400-35. Fittings. Connectors used to connect lengths of cable in a run shall be of a type that lock firmly together. Provisions shall be made to prevent opening or closing these connectors while energized. Suitable means shall be used to eliminate tension at connectors and terminations. 400-36. Splices and Terminations. Portable cables shall not contain splices unless the splices are of the permanent molded, vulcanized types in accordance with Section 110-14(b). Terminations on portable cables rated over 600 volts, nominal, shall be accessible only to authorized and qualified personnel. ARTICLE 402 - FIXTURE WIRES 402-1. Scope. This article covers general requirements and construction specifications for fixture wires. 402-2. Other Articles. Fixture wires shall comply with this article and also with the applicable provisions of other articles of this Code. (FPN): For application in lighting fixtures, see Article 410. 402-3. Types. Fixture wires shall be of a type listed in Table 402-3, and they shall comply with all requirements of that table. The fixture wires listed in Table 402-3 are all suitable for service at 600 volts, nominal, unless otherwise specified. (FPN): Thermoplastic insulation may stiffen at temperatures colder than minus 10°C (plus 14°F), requiring care be exercised during installation at such temperatures. Thermoplastic insulation may also be deformed at normal temperatures where subjected to pressure, requiring care be exercised during installation and at points of support. 402-5. Allowable Ampacities for Fixture Wires. The ampacity of fixture wire shall be as specified in Table 402-5. No conductor shall be used under such conditions that its operating temperature will exceed the temperature specified in Table 402-3 for the type of insulation involved. (FPN): See Section 310-10 for temperature limitation of conductors. Table 402-3. Fixture Wire Max. 70-324 Trade Type Thickness of Outer Operating Application Name Letter Insulation AWG Insulation Mils Covering Temp. Provisions Thickness of Moisture- Thick- Resistant ness of Insulation Asbestos Mils Mils Asbestos Cov- AF Impregnated 18-14 - 30 Fixture wiring. ered Heat- Asbestos or 20 10 None 150°C Limited to 300 Resistant Fix- Moisturevolts and indoor ture Wire Resistant Insu- 12-10 - 45 302°F dry locations. lation and 25 20 Impregnated Asbestos Heat-Resistant Rubber- Heat-Resistant Covered Fix- Rubber 18-16 30 Nonmetallic 75°C Fixture wiring, and FFH-2 NATIONAL ELECTRICAL CODE ture Wire Covering 167°F as permitted in