Liebert 600T installation manual Wiring Inspection

10.0WIRING INSPECTION

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UPS Module Rating	Connection Type
65 & 80 kVA	Rectifier input is top entry, to lugs in the top of the input circuit breaker. Lugs
	will accommodate cabling up to 350MCM. DC link and critical bus output
	are top entry, to frame-mounted terminal blocks with one 3/8-
	16x1 stud per phase or polarity. All units have two access plates in the top
	grille assembly. A bottom-entry access plate is also standard, to enable the
	installer to pull AC cables through the module to the connections on top.
100-225 kVA	For “SpaceSaver” modules in the 48” frame, rectifier input wiring is
	top-entry, directly to lugs on top of their respective circuit breakers.
	DC link and critical bus output connection are top entry, to frame-
	mounted lugs.
	Standard modules with top-and-bottom entry have access plates and
	wireway the right side of the modules. All power connections are
	to bus bars in the wireway.
Use 75°C copper wire. Select	size based on the ampacities Table 310-16(see Table 3 of this
manual) and associated notes of the National Electrical Code (NFPA 70).

Use commercially available solderless lugs for the wire size required for your application. Connect wire to the lug using tool and procedure specified by the lug manufacturer.

Table 2	Torque Specifications
Nut and Bolt Combinations
			Grade 2			Electrical Connections
		Standard				with Belleville Washers
	Bolt Shaft Size	Lb-in			N-m	Lb-in	N-m
	1/4	53			6.0	46	5.2
	5/16	107			12	60	6.8
	3/8	192			22	95	11
	1/2	428			48	256	29
Circuit Breakers With Compression Lugs (For Power Wiring)
Cable Size or Range		Lb-in			N-m
	#6 - #4	100			11
	#3 - #1	125			14
	1/0 - 2/0	150			17
	3/0 - 200 MCM	200			23
	250 - 400 MCM	250			28
	500 - 700 MCM	300			34
Terminal Block Compression Lugs (For Control Wiring)
AWG Wire Size or Range		Lb-in			N-m
	#22 - #14	3.5 to 5.3		0.4 to 0.6
Use the values in this table unless the equipment is labeled with a
different torque value.

26 Wiring Inspection