Underwriters LaboratoriesUL 1449Standard for Surge Protective Devices.Referenced across 3 Anvilfield field guides. Field guides that apply UL 1449DatacenterDatacenterData center grounding and SRGDatacenterSPD installation field guideElectricalElectricalSurge protection (SPD) field guide Often cited alongsideNECNFPA 780IEEE 1100IEEE 142TIA-607 Browse all codes and standards