Multiquip DCA25USI manual Load Application, Single Phase Load, Three Phase Load, Type of Load

Load Application

Single Phase Load

Always be sure to check the nameplate on the generator and equipment to insure the wattage, amperage, frequency, and voltage requirements are satisfactorily supplied by the generator for operating the equipment.

Generally, the wattage listed on the nameplate of the equipment is its rated output. Equipment may require 130—150% more wattage than the rating on the nameplate, as the wattage is influenced by the efficiency, power factor and starting system of the equipment.

NOTICE

If wattage is not given on the equipment’s name plate, approximate wattage may be determined by multiplying nameplate voltage by the nameplate amperage.

WATTS = VOLTAGE x AMPERAGE

The power factor of this generator is 0.8. See Table 5 below when connecting loads.

Table 5. Power Factor By Load

	Type of Load				Power Factor
Single-phase induction motors					0.4-0.75
Electric heaters, incandescent lamps					1.0
Fluorescent lamps, mercury lamps					0.4-0.9
Electronic devices, communication					1.0
equipment
Common power tools					0.8
Table 6. Cable Selection (60 Hz, Single Phase Operation)
Current	Load in Watts		Maximum Allowable Cable Length
in	At 100	At 200	#10 Wire	#12 Wire	#14 Wire	#16 Wire
Amperes
	Volts	Volts
2.5	300	600	1000 ft.	600 ft.	375 ft.	250 ft.
5	600	1200	500 ft.	300 ft.	200 ft.	125 ft.
7.5	900	1800	350 ft.	200 ft.	125 ft.	100 ft.
10	1200	2400	250 ft.	150 ft.	100 ft.
15	1800	3600	150 ft.	100 ft.	65 ft.
20	2400	4800	125 ft.	75 ft.	50 ft.
	CAUTION: Equipment damage can result from low voltage

Three Phase Load

When calculating the power requirements for 3-phase power use the following equation:

NOTICE

If 3Ø load (kVA) is not given on the equipment nameplate, approximate 3Ø load may be determined by multiplying voltage by amperage by 1.732.

NOTICE

Motors and motor-driven equipment draw much greater current for starting than during operation.

An inadequate size connecting cable which cannot carry the required load can cause a voltage drop which can burn out the appliance or tool and overheat the cable. SeeTable 6.

„„When connecting a resistance load such as an incandescent lamp or electric heater, a capacity of up to the generating set’s rated output (kW) can be used.

„„When connecting a fluorescent or mercury lamp, a capacity of up to the generating set’s rated output (kW) multiplied by 0.6 can be used.

„„When connecting an electric drill or other power tools, pay close attention to the required starting current capacity.

When connecting ordinary power tools, a capacity of up to the generating set’s rated output (kW) multiplied by 0.8 can be used.

DANGER

Before connecting this generator to any building’s electrical system, a licensed electrician must install an isolation (transfer) switch. Serious damage to the building’s electrical system may occur without this transfer switch.

DCA25usi 60 hz Generator • operation and parts manual — rev. #3 (07/19/11) — page 23