Toshiba 431A Recommended/Maximum Wire size and Torque Requirement, Sizes Lug Tightening Torque

TABLE 12.2 - 431B POWER CABLE SIZES

(Cable sizes for 75°C Copper Cable)

Recommended/Maximum Wire size and Torque Requirement

UPS	Maximum DC	Batt Cab	Recommended Cable	UPS Terminal	431B MCCB Lug
Rating	Current	MCCB	Sizes	Lug Tightening	Tightening
				Torque	Torque
30 kVA	127 Adc	150 A	#1 AWG – 350 kcmil	200 lb-in	225 lb-in (25 N•M)
50 kVA	214 Adc	250 A	250 kcmil – 350 kcmil	200 lb-in	225 lb-in (25 N•M)

* Wire capacity for DC lugs is 350 kcmil - 6 AWG,

TABLE 12.3 - 431B MCCB CONNECTIONS

Battery Cab	MCCB	Lug Cable	Condutors	Strip	Lug Torque
Capacity	Rating	Capacity	per Lug	Length
30 kVA	150 A	#4 AWG - 4/0	1	1 in.	225 lb-in (25 N•M)
50 kVA	250 A	3/0 - 350 kcmil	1	1 in.	225 lb-in (25 N•M)

Go to Section 12.4

12.4Place the 431B Cabinet

The 431B Cabinet has four mounting holes to anchor the unit after is has been set in place. See Figure 12-4. Use 1/2 in (12 mm) bolts to anchor the 431B.

Verify the Left Side Access Plate of the 431B and the corresponding Right side ac- cess plate of the 4300 UPS are removed before anchoring the unit.

NOTE: Ensure the 431B can be joined to the UPS before final anchoring of the 431A. Use four 3/8 in. -16 x 2 in long bolts to bolt the ancillary cabinet frames together. See Section 12.5.

Figure 12-4 - 431B Base Anchor Points

4 x 0.63 in. Dia. (16 mm) Back

26.7 in..

(677 mm)

Front

19.0 in. (483 mm)

44 4300 Series Ancillary Cabinets Installation and Operation Manual