**(D) Small Conductors. **Unless specifically permitted in
240.4(E) or 240.4(G), the overcurrent protection shall not
exceed 15 amperes for 14 AWG, 20 amperes for 12 AWG,
and 30 amperes for 10 AWG copper; or 15 amperes for
12 AWG and 25 amperes for 10 AWG aluminum and
copper-clad aluminum after any correction factors for
ambient temperature and number of conductors have
been applied.
ok…so here is (E)
**[FONT=Times-Bold]size=2 Tap Conductors. **Tap conductors shall be permitted to
be protected against overcurrent in accordance with the following:
(1) 210.19(A)(3) and (A)(4) Household Ranges and Cooking
Appliances and Other Loads
(2) 240.5(B)(2) Fixture Wire
(3) 240.21 Location in Circuit
(4) 368.17(B) Reduction in Ampacity Size of Busway
(5) 368.17© Feeder or Branch Circuits (busway taps)
(6) 430.53(D) Single Motor Taps
Ok…here is (G)
**[FONT=Times-Bold]size=2 Overcurrent Protection for Specific Conductor
Applications. **Overcurrent protection for the specific conductors
shall be permitted to be provided as referenced in
Table 240.4(G).
**[FONT=Times-Bold][size=1]Table 240.4(G) Specific Conductor Applications
Conductor Article Section
**Air-conditioning and
refrigeration equipment circuit conductors
440, Parts III, VI
Capacitor circuit conductors
460 460.8(B) and 460.25(A)–(D)
Control and instrumentation circuit conductors (Type ITC)727 727.9
Electric welder circuit conductors 630 630.12 and 630.32
Fire alarm system circuit conductors
760 760.23, 760.24, 760.41, and Chapter 9, Tables 12(A) and 12(B)
Motor-operated appliance circuit conductors
422, Part II Motor and motor-control circuit conductors 430, Parts III,
IV, V, VI, VII
Phase converter supply conductors 455 455.7
Remote-control, signaling, and
power- limited circuit conductors 725 725.23, 725.24,
725.41, and Chapter 9, Tables 11(A) and 11(B)
Secondary tie conductors450 450.6
OK…see…CODE made that more than it needed to be…if the Nameplate says Minimum Ampacity 20A and Maximum OCPD is 40A…then you can size the conductors to it for 20A and size the OCPD at 40A…be done with it.
Posting CODE on that one just…well…is way to involved…
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