Xantrex Technology PROsine 2.0 user manual 2 Required DC Cable and Fuse Size

			Step 1: Designing the Installation
DC Cabling	This includes all the cables and connectors between the batteries, the DC
	disconnect and over-current protection device, and the PROsine. All installations
	require multi-strand insulated cables as well as disconnect and over-current
	devices. DC cable sizes are indicated by AWG notation or MCM notation. Under
	the AWG standard, a larger gauge number indicates a smaller wire diameter.
	Under the MCM standard, a larger number indicates a larger cable. Wire size is
	usually marked on the cables for sizes this large. Table 3-2 specifies the minimum
	DC cable size and maximum fuse size for the PROsine. The DC cables must be
	copper and must be rated 75°C minimum. The cables should be terminated
	with lugs that fit the DC stud terminals snugly (8 mm or 5/16 in. hole size).
	Table 3-2Required DC Cable and Fuse Size
	DC Cable Length	Cable Size	Fuse Amps
	Less than 6 feet	250MCM	300A class T
	Between 6 and 12 feet	350MCM	300A class T
	Important: Using the correct cable size is critical to achieving the rated performance of
	the PROsine unit. When starting a heavy load the PROsine can draw current surges from
	the battery of up to 600A. If the wire is too small the voltage drop from this surge will
	result in a voltage at the PROsine terminals that is too low for the PROsine to operate
	correctly. The PROsine may appear to operate correctly with smaller cables until a heavy
	load such as an air conditioner attempts to start - then the unit may work correctly
	sometimes and not work correctly other times.
DC Disconnects and	The DC circuit from the battery to the PROsine must be equipped with a
Over-Current	disconnect and over-current device. This usually consists of a circuit breaker, a
Devices	“fused-disconnect,” or a separate fuse and DC disconnect. Do not confuse AC
	circuit breakers with DC circuit breakers. They are not interchangeable. The
	rating of the fuse or breaker must be matched to the size of cables used in
	accordance with the applicable installation codes. The breaker or disconnect and
	fuse should be located as close as possible to the battery, in the positive cable.
	Applicable codes may limit how far the protection can be from the battery.
Batteries	Every PROsine system requires a deep-cycle battery or group of batteries that
	provide the DC current that the PROsine converts to AC. Different battery types
	and sizes are available; many of these are discussed in Application Note: Battery
	Banks for Inverter Systems (976-0114-01-01). Automotive-type starting or
	“cranking” batteries are not recommended, except for temporary emergency use.
	The PROsine uses 12-volt battery banks.
Ground Fault	A GFCI is a device that de-energizes a circuit when a current to ground exceeds a
Circuit Interrupters	specified value that is less than that required to blow the circuit breaker. GFCIs
(GFCIs)	are intended to protect people from electric shocks and are usually required in wet
	or damp locations.

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