Xantrex Technology XW manual Wiring to the 20-contact Connector, Circuit Parameter Circuit Maximum

Installing the XW Automatic Generator Start

Wiring to the 20-contact Connector

	CAUTION: Shock Hazard
	All installation wiring should be performed by a qualified installer or electrician.
	WARNING: Fire, Shock, and Energy Hazards
	The 20-contact connector is intended for connection to Class 2 ELV (Extra Low
	Voltage) circuits only. Do not exceed the circuit limitations specified in the
	following section.
ELV Circuits	ELV (Extra-Low Voltage) circuits have an open-circuit voltage of not
	more than 30 Vrms or 42.2 VDC or peak, and are therefore not a shock
	hazard.
Class 2 Circuits	As per the US National Electrical Code (NEC) and the Canadian
	Electrical Code (CEC), available power in Class 2 circuits is limited to
	100 VA, usually by current limiting by means of overcurrent protection or
	series resistance. The current is limited to 5 A for circuits with open-
	circuit voltage of 20 V, and to I=100/Voc for circuits with open circuit
	voltage between 20 V and 30 V.
Circuit	The relay contacts in the XW Auto Generator Start are rated at 5 A
Limitations	maximum and all circuits on the 20-contact connector are rated at 30 V
	maximum.
	Ensure that all circuits connected to the 20-contact connector comply with
	the following limits:
	Table 2-1Circuit Limitations
	Circuit Parameter	Circuit Maximum
	Open circuit voltage (Voc)	30 V maximum
	Overcurrent protection	5 A maximum
	(fuse size for open circuit voltage up to 20 V)
	Overcurrent protection	5 A to 3.33 A
	(fuse size for open circuit voltage from 20 V to 30 V)	(100/Voc amps
		maximum)
Wiring Harness	Connections to the generator, thermostats, and external ON/OFF switches
	are made using a wiring harness that plugs into the 20-contact connector
	(see Figure 2-1).

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