Home
gpo.gov
govinfo.gov

e-CFR Navigation Aids

Browse

Simple Search

Advanced Search

 — Boolean

 — Proximity

 

Search History

Search Tips

Corrections

Latest Updates

User Info

FAQs

Agency List

Incorporation By Reference

eCFR logo

Related Resources

Electronic Code of Federal Regulations

We invite you to try out our new beta eCFR site at https://ecfr.federalregister.gov. We have made big changes to make the eCFR easier to use. Be sure to leave feedback using the Help button on the bottom right of each page!

e-CFR data is current as of September 21, 2020

Title 46Chapter ISubchapter JPart 113Subpart 113.10 → §113.10-9


Title 46: Shipping
PART 113—COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT
Subpart 113.10—Fire and Smoke Detecting and Alarm Systems


§113.10-9   Power supply.

(a) General. There must be at least two sources of power for the electrical equipment of each fire detecting and alarm system. The normal source must be the main power source. The other source must be the emergency power source or an automatically charged battery. If the other source is an automatically charged battery, the charger must be supplied from the final emergency power source. Upon loss of power to the system from the normal source, the system must be automatically supplied from the other source.

(b) Batteries. Each battery used in a fire detecting and alarm system must meet Subpart 111.15 of this chapter.

(c) Capacity of power supply branch circuit. The capacity of each branch circuit providing power to a fire detection or alarm system must not be less than 125 percent of the maximum load.

[CGD 74-125A, 47 FR 15272, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28288, June 4, 1996]

Need assistance?