---
kind: "section"
citation: "49 C.F.R. § 234.243"
title: "49"
number: "234.243"
heading: "Wire on pole line and aerial cable."
url: "https://uscodex.org/cfr/49/234.243"
---

# §234.243. Wire on pole line and aerial cable.


Wire on a pole line shall be securely attached to an insulator that is properly fastened to a cross arm or bracket supported by a pole or other support. Wire shall not interfere with, or be interfered with by, other wires on the pole line. Aerial cable shall be supported by messenger wire. An open-wire transmission line operating at voltage of 750 volts or more shall be placed not less than 4 feet above the nearest cross arm carrying active warning system circuits.


## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20152, 20160, 21301, 21304, 21311, 22907 note; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 61 FR 31806, June 20, 1996, unless otherwise noted.