Question

Branch-circuit conductors supplying a single motor compressor shall have an ampacity not less than 125% of either the motor-compressor rated load current or the branch-circuit selection current, whichever is greater. For a wye-start, delta-run connected motor-compressor, the selection of branch-circuit conductors between the controller and the motor-compressor shall be permitted to be based upon__________________.

Answer 1

Branch-circuit conductors supplying a single motor compressor shall have an ampacity not less than 125% of either the motor-compressor rated load current or the branch-circuit selection current, whichever is greater. For a wye-start, delta-run connected motor-compressor, the selection of branch-circuit conductors between the controller and the motor-compressor shall be permitted to be based upon 72% of either the motor-compressor rated-load current or the branch-circuit selection current, whichever is greater.

Explanation:

A branch circuit consists of the conductors between the final over current safety equipment and the exhaust system(s).It consists of drivers between the final over current protection equipment (OCPD) and the receptacle outlets, the illumination outlet(s).

The OCPDs must produce an ampacity of not under 125% of the continuous loads plus 100% of the non-continuous loading.

You must not exceed 125% of the continuous charges, plus 100% of the non-consistent charges