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// CODE SNIPPET

E3705.5 Overcurrent Protection Required

Residential Code 2018 of Kansas > 37 Branch Circuit and Feeder Requirements > E3705 Conductor Sizing and Overcurrent Protection > E3705.5 Overcurrent Protection Required
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All ungrounded branch-circuit and feeder conductors shall be protected against overcurrent by an overcurrent device installed at the point where the conductors receive their supply. Overcurrent devices shall not be connected in series with a grounded conductor. Overcurrent protection and allowable loads for branch circuits and for feeders that do not supply the entire load associated with a one-family dwelling or the entire load associated with an individual dwelling unit in a two-family dwelling shall be in accordance with this chapter.
Branch-circuit conductors and equipment shall be protected by overcurrent protective devices having a rating or setting not exceeding the allowable ampacity specified in Table E3705.1 and Sections E3705.2, E3705.3 and E3705.4 except where otherwise permitted or required in Sections E3705.5.1 through E3705.5.3. [240.4, 240.21, and 310.15(B)(7)(2)]

E3705.5.1 Cords

Cords shall be protected in accordance with Section E3909.2. [240.5(B)]

E3705.5.2 Overcurrent Devices of the Next Higher Rating

The next higher standard overcurrent device rating, above the ampacity of the conductors being protected, shall be permitted to be used, provided that all of the following conditions are met:
  1. The conductors being protected are not part of a branch circuit supplying more than one receptacle for cord- and plug-connected portable loads.
  2. The ampacity of conductors does not correspond with the standard ampere rating of a fuse or a circuit breaker without overload trip adjustments above its rating (but that shall be permitted to have other trip or rating adjustments).
  3. The next higher standard device rating does not exceed 400 amperes. [240.4(B)]

E3705.5.3 Small Conductors

Except as specifically permitted by Section E3705.5.4, the rating of overcurrent protection devices shall not exceed the ratings shown in Table E3705.5.3 for the conductors specified therein. [240.4(D)]
TABLE E3705.5.3 [240.4(D)]
OVERCURRENT-PROTECTION RATING
COPPERALUMINUM OR COPPER-CLAD
ALUMINUM
Size
(AWG)
Maximum overcurrent-
protection-device ratinga
(amps)
Size
(AWG)
Maximum overcurrent
protection-device ratinga
(amps)
14151215
12201025
1030830
  1. The maximum overcurrent-protection-device rating shall not exceed the conductor allowable ampacity determined by the application of the correction and adjustment factors in accordance with Sections E3705.2 and E3705.3.

E3705.5.4 Air-Conditioning and Heat Pump Equipment

Air-conditioning and heat pump equipment circuit conductors shall be permitted to be protected against overcurrent in accordance with Section E3702.11. [240.4(G)]

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