Underwriters LaboratoriesUL 1008Standard for Transfer Switch Equipment.Referenced across 3 Anvilfield field guides. Field guides that apply UL 1008ElectricalElectricalATS commissioning field guideElectricalEmergency and standby power systemsElectricalStandby generator install Often cited alongsideNECNFPA 110NETANFPA 101NFPA 99 Browse all codes and standards