Certification matters
Why UL 508A is the standard that matters.
When an inspector or insurance carrier looks at your machine’s safety controls, they look for a single thing: third-party safety certification. UL 508A is the U.S. standard for industrial control panels — and it’s what plant managers, code officials, and underwriters actually recognize.
OSHA + ANSI compliance ≠ panel certification.
A lot of anti-restart devices are marketed as “OSHA compliant” or “ANSI compliant.” That phrasing is doing a lot of work. OSHA 1910.213 sets behavioral requirements for what a machine must do — it doesn’t certify any particular product. ANSI publishes standards. Neither inspects panels.
UL 508A is different. It’s a third-party safety certification specifically for the industrial control panel itself. UL evaluates the build quality, electrical safety, component ratings, and labeling, and lists the product publicly. Look it up in UL Product iQ — every UL 508A panel is searchable by file number.
The blunt version
Lookalike anti-restart controls on the market today are not UL 508A listed. They borrow OSHA / ANSI language, but the panel itself carries no third-party safety certification.
Why this matters to you (specifically).
Insurance carriers look for it
Property and liability underwriters routinely require UL 508A on safety control panels. An uncertified panel can void coverage on a work-related injury claim — exactly the moment you can’t afford it.
AHJ inspectors verify it
City and county code officials enforce NEC 2014 requirements. Listed panels carry the UL label; unlisted ones get red-tagged. Re-doing electrical work after a failed inspection is expensive.
OSHA citations cite it
When an OSHA inspector evaluates your machine safeguarding, they verify that listed components are present where required by 29 CFR 1910 Subpart O and S. Listed components shift the burden of proof off you.
It’s verifiable, in public
UL 508A panels are searchable by file number in UL Product iQ. Guardomation's anti-restart panels are listed. Uncertified competitor products aren't.
Pay attention to the spec sheet.
Before buying any anti-restart device, ask the seller to send you the spec sheet. Look for:
- UL 508A listing with a file number — searchable in UL Product iQ
- Published HP rating — if you can’t find a horsepower rating, the panel hasn’t been spec’d for your application
- NEMA enclosure rating (NEMA 4, 12, etc.) — matched to your environment
- NFPA 79 compliance language for industrial machine wiring
- Country of origin — Made in USA matters for federal contracts, Buy American programs, and many buyers
Guardomation’s GS-series: UL 508A listed.
Our anti-restart panel family — GS-104 plug-and-play, GS-104 hardwired, GS-104 MBAP & MBAI motor braking variants — all carry UL 508A certification. Made in USA, NEMA-rated enclosures, latching E-stop, published HP and amperage ratings on every spec sheet. The label is on the panel; the file number is in Product iQ. The option insurers and inspectors actually recognize.