TTS GLOBALStandard & market guideUL / NRTLTTS / Certification
Where it applies
Applies to electrical/electronic products, components and industrial equipment requiring North American safety evaluation. US and Canadian editions, differences and marks must be confirmed.
What the evidence needs to show
- Distinguish finished-product certification from recognised components
- Scope is controlled by models, critical parts, factories and follow-up conditions
- Critical-part or manufacturing-site changes usually require review
Build the evidence in this order
- Confirm market, installation and standard
- Review construction and critical parts
- Complete type tests and close findings
- Apply for certification, factory review and follow-up
Common misunderstandings
- A report to a UL standard does not necessarily mean the product is listed
- Marks may be used only within certificate scope and surveillance conditions
Official reference
Confirm product-specific scope and the applicable edition with TTS before making a compliance decision.