---
kind: "section"
citation: "30 C.F.R. § 56.6407"
title: "30"
number: "56.6407"
heading: "Circuit testing."
url: "https://uscodex.org/cfr/30/56.6407"
---

# §56.6407. Circuit testing.


A blasting galvanometer or other instrument designed for testing blasting circuits shall be used to test each of the following:

- (a) Continuity of each electric or electronic detonator in the blasthole prior to stemming and connection to the blasting line.
- (b) Resistance of individual series or the resistance of multiple balanced series to be connected in parallel prior to their connection to the blasting line.
- (c) **Continuity of blasting lines prior to the connection of electric or electronic detonator series.**
- (d) **Total blasting circuit resistance prior to connection to the power source.**

## Notes

### Amendments

[61 FR 36795, July 12, 1996, as amended at 85 FR 2027, Jan. 14, 2020]

### Source

Source: 61 FR 36795, July 12, 1996, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4054, Jan. 29, 1985, unless otherwise noted.

### Amendments

[61 FR 36795, July 12, 1996, as amended at 85 FR 2027, Jan. 14, 2020]