Low-voltage AC Power-switching Devices, PAPU

Guide Information for Electrical Equipment for Use in Ordinary Locations


This category covers devices such as low-voltage ac power circuit breakers, low-voltage dc power circuit breakers, low-voltage ac power circuit protectors, low-voltage ac integrally-fused power circuit breakers, and low-voltage power-switching device adapters.

Low-voltage power-switching devices have been investigated for continuous duty at 100% of their current ratings and are designed to provide service-entrance, feeder or branch-circuit protection. They may be manually and/or electrically operable.

These low-voltage power-switching devices, enclosures and adapters are for use with copper conductors unless marked to indicate which terminals are suitable for use with aluminum conductors. Such markings are independent of any marking on terminal connectors and are on a wiring diagram or other readily-visible location.

Stationary equipment is normally bus connected. However, terminal pads are provided which can accommodate field-installed pressure-wire connectors.


Unless the device is marked to indicate otherwise, the wiring space and current-carrying capacity are based on the use of 60°C wire in circuits rated 100 A or less, and on the use of 75°C wire for higher amp-rated circuits.

Low-voltage power-switching devices suitable for use with an accessory are marked to indicate the accessory(s), the electrical rating and proper connections (if not obvious).

Low-voltage power-switching devices without enclosures are intended for use only in Listed enclosures or as part of other Listed equipment which has been and are marked for use with a specific low-voltage power switching device.

* * * * * * * * * * * * * * * * * * * * * * * * *

UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. UL shall not incur any obligation or liability for any loss, expense or damages, including incidental or consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Guide Information.

Last Updated on 1987-04-16
PAPU.GuideInfo PAPU ACTIVE 19870416 19870416

The appearance of a company's name or product in this database does not in itself assure that products so identified have been manufactured under UL's Follow-Up Service. Only those products bearing the UL Mark should be considered to be Certified and covered under UL's Follow-Up Service. Always look for the Mark on the product.

UL permits the reproduction of the material contained in the Online Certification Directory subject to the following conditions: 1. The Guide Information, Assemblies, Constructions, Designs, Systems, and/or Certifications (files) must be presented in their entirety and in a non-misleading manner, without any manipulation of the data (or drawings). 2. The statement "Reprinted from the Online Certifications Directory with permission from UL" must appear adjacent to the extracted material. In addition, the reprinted material must include a copyright notice in the following format: "© 2019 UL LLC".