Liebert Series 300 - Manuel (Page 25)

Installation 17
Table 5 Connection Type / Wire Size Range
Connection Type
UPS Module
Rating
kVA AC Input Battery
Bypass Input
& AC Output Neutral Ground
10 - 30 Compression
lug
#14 to #1/0
Compression
lug
#14 to #1/0
Compression
lug
#14 to #1/0
Compression
lug
#14 to #1/0
Ground studs
3/8" - 16 x 1.00"
Lug required
40 - 50 Compression
lug
#6 to 250 kcmil
Compression
lug
#6 to 250 kcmil
Compression
lug
#6 to 250 kcmil
Natural studs
3/8" - 16 x 1.00"
Lug required
Ground studs
3/8" - 16 x 1.00"
Lug required
65 - 125 Bus bars (2” x 3-1/4”) with connecting hardware (3/8”) are provided for all power wiring
terminations. A field-supplied lug is required.
Use factory supplied connections for terminations where they are provided. Refer to Figure 16 for field-
supplied wiring termination details. Use commercially available UL listed 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 6 Torque Specifications (Unless Otherwise Labeled)
Nut and Bolt Combinations
Bolt Shaft Size
Grade 2
Standard
Electrical Connections
with Belleville Washers
Lb-in N-m Lb-in N-m
1/4 53 6.0 46 5.2
5/16 107 12.1 60 6.8
3/8 192 21.7 95 10.7
1/2 428 48.4 256 28.9
Terminal Block Compression Lugs
UPS Module
Rating
kVA Wiring
Wire Size or
Range Lb-in N-m
10 - 125 Control #22 - #14 3.5 to 5.3 0.4 to 0.6
10 - 30 Power #6 - #1/0 50 5.6
40 - 50 Power #6 250 28.2
250 kcmil 275 31.1