---
kind: "section"
citation: "46 C.F.R. § 111.05-17"
title: "46"
number: "111.05-17"
heading: "Generation and distribution system grounding."
url: "https://uscodex.org/cfr/46/111.05-17"
---

# §111.05-17. Generation and distribution system grounding.


The neutral of each grounded generation and distribution system must:

- (a) Be grounded at the generator switchboard, except the neutral of an emergency power generation system must be grounded with:
  - (1) No direct ground connection at the emergency switchboard;
  - (2) The neutral bus permanently connected to the neutral bus on the main switchboard; and
  - (3) No switch, circuit breaker, or fuse in the neutral conductor of the bus-tie feeder connecting the emergency switchboard to the main switchboard; and
- (b) Have the ground connection accessible for checking the insulation resistance of the generator to ground before the generator is connected to the bus.

## Notes

### Authority

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

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