UL Classified breakers are produced by one manufacturer for use in place of the breakers specified on the panelboard. Like specified breakers, UL Classified breakers have been tested in the panels for which they are approved.

What is UL breaker?

UL Classified breakers are produced by one manufacturer for use in place of the breakers specified on the panelboard. Like specified breakers, UL Classified breakers have been tested in the panels for which they are approved.

What is the UL Standard for molded case circuit breakers?

These circuit breakers are intended to be installed in accordance with the National Electrical Code® (NEC ®) and their listing. These markings are required by UL 489, and are part of the listing.

What is UL MCB?

UL 1077 Approved MCB. Designed for protection of electrical installations against overload and short circuits, this high performing range of DIN rail mountable MCBs have been manufactured in accordance with UL 1077. • Available from 0.5 Amps to 63 Amps.

What is UL 489 circuit breaker?

UL489 miniature circuit breakers (MCBs) ensure electrical safety in multiple applications. UL489 MCBs feature two different tripping mechanisms, the delayed thermal tripping mechanism for overload protection, and the magnetic tripping mechanism for short circuit protection.

Are Square D breakers compatible with Eaton?

Eaton’s UL classified breakers are designed and tested to be both mechanically and electrically interchangeable with circuit breakers manufactured by General Electric, Thomas & Betts, ITE/Siemens, Murray, Crouse-Hinds, and Square D. Video Player is loading.

What breakers fit a Thomas and Betts?

This handy chart seems to show that the Eaton CL230 breaker is a “Classified” replacement for the Thomas Betts TB230 breaker. Since this is a pretty common breaker sold at national big box home improvement stores it should be straightforward to compare the two.

What UL 1008?

UL 1008 devices are often called transfer switches. Transfer switches are used to transfer the power source of the emergency circuit from normal power to back-up power in the event of normal power loss. Typically, these are large and used to switch over entire buildings to back-up power.

What UL 1077?

UL 1077 supplementary protectors. Used for overcurrent protection within appliances or electrical equipment, where branch circuit protection is already provided or not required.

How many UL standards are there?

With over a century of experience in the development of more than 1,500 Standards, UL is an accredited standards developer in the US and Canada. In extending its global public safety mission, UL Standards partners with national standards bodies in countries around the world to build a safer, more sustainable world.

What is ul98?

UL 98 is the UL Standard entitled Enclosed and Dead-Front Switches. This large standard details the design and testing requirements for switches to be used as branch circuit, feeder, service, and motor circuit disconnecting means.

What is the difference between ul489 and ul1077?

The general rule is that a UL 489 circuit breaker can protect multiple devices at one time, such as an entire control panel; whereas a UL 1077 supplementary protector protects one device, EXCEPT FOR those that feed motors or transformers and those that exit the equipment.

Are Square D and Eaton the same?

The answer is simple: the same company owns the production rights for both Eaton and Westinghouse. Westinghouse had a low-voltage air circuit breaker line. The company sold the rights to this product line to Square D, which then sold it to Eaton Corporation.

Are molded-case circuit breakers UL listed?

Under the UL services, Molded-Case Circuit Breakers are evaluated and “Listed” to UL 489 for use as a standalone product and the UL follow-up service tests the devices (typically 2-4 times per year) to the original test specification.

What is Code No 1 for circuit breakers?

No.1. This standard also covers instantaneous-trip circuit breakers (circuit interrupters) specifically intended for use as part of a combination motor controller in accordance with the National Installation Codes in Annex B, Ref. No. 1. This standard covers molded-case switches and fused molded-case switches.

What is a class CTL circuit breaker?

Requirements in UL 489 permit manufacturers to identify “Class CTL” circuit breakers as those with a physical means to prevent the installation of more than 42 circuit breakers into a Class CTL panelboard (or if fewer than 42, that number for which the panelboard was designed and rated).

What is the voltage rating of a circuit breaker?

Voltage Rating — All circuit breakers are marked with a voltage rating, including: 60, 125, 125/250, 160, 250, 500 and 600 volts for dc; and 120, 127, 120/240, 240, 277, 347, 480Y/277, 480,