1. Regulations
  2. title 46
  3. chapter I-i3
  4. part 111
  5. subpart 111.51
  6. § 111.51-2

View all text of Subpart 111.51 [§ 111.51-1 - § 111.51-5]

§ 111.51-2 - Short-circuit calculations.

(a) The available short-circuit current must be computed—

(1) From the aggregate contribution of all generators that can simultaneously operate in parallel;

(2) From the largest probable motor load; and

(3) With a three-phase fault on the load terminals of the protective device.

(b) The calculated currents must be used to select suitably rated equipment and to allow the selection and setting of protective devices.

AUTHORITY: 46 U.S.C. 3306, 3703; DHS Delegation No. 00170.1, Revision No. 01.2. Section 111.05-20 and Subpart 111.106 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905.

SOURCE: CGD 74-125A, 47 FR 15236, Apr. 8, 1982, unless otherwise noted.

CITE AS: 46 CFR 111.51-2