UL 2556:2021 STANDARD FOR SAFETY Wire and Cable Test Methods

UL 2556:2021 is a safety standard specifying test methods for evaluating the electrical, mechanical, thermal and flammability performance of wires and cables. It defines uniform testing procedures and equipment to verify product safety and reliability.

This standard serves as a fundamental reference for wire and cable manufacturers and testing laboratories, supporting product compliance and certification across North America and global markets.

LISUN supplies the fully test solutions for the following UL 2556:2021, please see the below excel table:

UL 2556:2021 Clause and Subject	LISUN MODEL
3.5 Physical properties of conductors (tensile strength, elongation at break, and ultimate strength)	PULL-2000KG
4.2 Physical properties (ultimate elongation and tensile strength)	PULL-2000KG
4.2.8.2 Short-term air-oven aging	GW-225-AH
4.2.8.5 Weather (sunlight) resistance	XD-WAT-Ci3000
4.3 Dry temperature rating of new materials (long-term aging test)	GDJS-015B
7.2 Heat shock
7.3 Heat shock resistance
6.4 Insulation resistance	WB2681A
6.11 AC leakage current test through insulation	WB2675D
7.6 Cold bend	LS-B39
7.10 Abrasion resistance	WDT-B49
7.26 Flexing of shielded cables	WDT-B42
8.1 Copper corrosion	YWX/Q-010
8.2 Ozone resistance	OTC-150A
9 Burning Characteristics Tests	ZY-3
9.1 FT2/FH/Horizontal flame	HVR-LS
9.5 FV-1/Vertical flame	HVR-LS