Receiving & Installation 3‐9MN2408Electrical Connections Class 1 wiring methods must be used for field wiring connections to terminals of a class2 circuit. It is the responsibility of the owner/operator to arrange for these procedures to beperformed by a licensed electrical contractor and ensure conformance to all applicable codesincluding local codes peculiar to your municipality/city/county and state. Wire size and insulationtype should be as required by NEC (National Electrical Code) and local codes.Warning: Never connect this generator to the electrical system of any building unless a licensedelectrician has installed an approved transfer switch. The national electrical code (NEC)requires that connection of a generator to any electrical circuit normally powered by means ofan electric utility must be connected by means of approved transfer switch equipment toisolate the electrical circuit from the utility distribution system when the generator isoperating. Failure to isolate the electrical circuits by such means may result in injury or deathto utility power workers due to backfeed of electrical energy onto the utility lines.Warning: Incorrect installation of this generator set could result in property damage, injury or death.Connection of the generator to its fuel source must be done by a qualified professionaltechnician or contractor.WARNING: Be sure the system is properly grounded before applying power. Do not apply AC powerbefore you ensure that grounds are connected. Electrical shock can cause serious or fatalinjury. NEC requires that the frame and exposed conductive surfaces (metal parts) beconnected to an approved earth ground. Local codes may also require proper grounding ofgenerator systems.Intended Use The intended purpose of this generator set is to provide emergency power when the main utilitypower supply is interrupted. Therefore, it is important that all the wiring that connects the generatorset with your house, transfer switch, distribution box, battery charger, etc. be properly installed.Circuit Protection Circuit protection is not provided within the generator. Circuit Breaker protection is an option.If purchased with your generator, the breaker box is mounted to the generator prior to shipment.If the optional circuit breaker protection was not ordered, see “GLC Circuit Breaker & Wire SizeData” in Appendix A for recommendations.Wire Size Proper lead wire from the circuit breaker to the automatic transfer switch (or load switchingdevice) is mandatory. See transfer switch information for connection information. Whenconnecting the generator output to an electrical load, a UL listed circuit breaker with theappropriate ratings must be provided within 25 feet of the generator set. Use only copper wires.Generator Rating Input Breaker Rating (at 115% FLA)Catalog No. Kilowatt (kW)Rating1 Phase Amps(240VAC) * 3 Phase Amps (240VAC) * 3 Phase Amps (480VAC) *LPV/Nat. GasDelta (Wye)Nat. GasDelta (Wye)LPVDelta (Wye)Nat. GasDelta (Wye)LPVDelta (Wye)GLC10 10 50GLC15 15 70GLC20 20 100GLC25 25 125GLC30 30 110 110 110 60 60GLC35 35 125 125 125 60 60GLC45 45 150 150 175 70 80GLC50 50 175 175 175 90 90GLC60 60 200 200 200(225) 100 110GLC80 80 300 300 300 150 150GLC100 100 300 300 350 150 175GLC125 125 450 450 400 225 200