UL and CSA certified Edison Class L fuses type LCL time-delay are recommended for high capacity main, feeder or branch circuits in power distribution systems and for special applications such as system upgrading or installation ahead of network protectors. Core features Dual element, current-limiting, and time-delay fuses. Time-delay fuses provide time-delay of 5 seconds (minimum) at 500% of rated current allows closer sizing on large motor loads