What is a UL 508A panel?
UL 508A certification is an industrial control panel directive, which is sought by electrical inspectors. The UL 508A Listing Mark on an industrial control panel provides evidence of third party certification to the municipal inspection authority and to the purchaser of the panel.
What components are allowed to be used in a UL 508A panel?
Examples would be DC power supplies, industrial PCs, and PLC components. UL-508 recognized components can be used in a UL-508A design, but only within the manufacturer’s installation specifications. These are components that cannot protect themselves such as terminal blocks, fuse blocks, and power distribution blocks.
Do industrial control panels need to be UL listed?
Before a control panel can carry the UL508A Listing Mark, it must include only UL-acknowledged and listed components. If a specific component has the UL Mark in place, it means that the UL evaluated and tested samples of it and deemed that it met its strict safety and security requirements.
What type of enclosure may a UL 508A panel shop?
According to UL (Underwriters Laboratories), a type 1 508A electrical enclosure is “an assembly incorporating two or more pieces of industrial control equipment or related control circuit devices, provided with interconnecting wiring and terminals for connections in the field.” This type of enclosure is meant for …
How long does UL certification last?
Pressure sensitive labels that are procured directly from UL have a 3 year expiration date. Manufacturers should have an inventory control system that ensures labels will not be utilized past this expiration date.
What is the maximum input supply voltage that can be in a UL 508A listed panels?
1000 volts
1.1 These requirements cover industrial control panels intended for general industrial use, operating from a voltage of 1000 volts or less.
What does UL label do?
A UL label is used to display safety-related information on products. It is submitted to and tested by UL in accordance with prescribed permanence of marking performance requirements.