Recommended Upstream Protection and Cable Sizes – UL

CAUTION
hazard of fire Connect only to a circuit with the below specifications. Connect only to a circuit provided with a maximum branch circuit overcurrent protection, as specified in the UPS rating tables below, in accordance with the National Electrical Code, ANSI/NFPA70, and the Canadian Electrical Code, Part I, C22.1. Failure to follow these instructions can result in injury or equipment damage.

NOTE: Overcurrent protection is to be provided by others.

NOTE: All wiring must comply with all applicable national and/or electrical code (National Electrical Code, ANSI/NFPA 70).

Cable sizes in this manual are based on Table 310.15 of the National Electrical Code 2014 (NEC) with the following assertions:

90 °C conductors (THHN) for 75 °C termination
Not more than 3 current carrying conductors in each conduit
An ambient temperature of max. 30 °C
Use of copper or aluminium conductors
100% rated breakers
Nominal operating conditions

If the ambient room temperature is greater than 30 °C, use larger or additional parallel conductors in accordance with the correction factors of the NEC. The maximum allowable conductor size is 600 kcmil.

Equipment Grounding Conductors (EGC) are sized in accordance with NEC Article 250.122 and Table 250.122 Minimum size equipment conductor for grounding equipment.

NOTE: Always consider the EGC size according to the complete electrical installation.

NOTE: The use of aluminium conductors can limit the number of parallel Lithium-ion battery cabinets. Contact Schneider Electric for more information.

NOTICE
Risk of equipment damage To ensure correct load sharing in bypass operation in a parallel system, the following recommendations apply: The bypass cables must be of the same length for all UPSs. The output cables must be of the same length for all UPSs. The input cables must be of the same length for all UPSs in a single mains system. Cable formation recommendations must be followed. The reactance of busbar layout in the bypass/input and output switchgear must be the same for all UPSs. If the above recommendations are not followed the result can be uneven load sharing in bypass and overload of individual UPSs. Failure to follow these instructions can result in equipment damage.

NOTICE

Risk of equipment damage

To ensure correct load sharing in bypass operation in a parallel system, the following recommendations apply:

The bypass cables must be of the same length for all UPSs.
The output cables must be of the same length for all UPSs.
The input cables must be of the same length for all UPSs in a single mains system.
Cable formation recommendations must be followed.
The reactance of busbar layout in the bypass/input and output switchgear must be the same for all UPSs.

If the above recommendations are not followed the result can be uneven load sharing in bypass and overload of individual UPSs.

Failure to follow these instructions can result in equipment damage.

Recommended Upstream Protection and Cable Sizes for 500 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	800 (I_r = 1.0)	2x500 / 3x400	1x1/0 / 1x3/0
Bypass	700 (I_r = 1.0)	2x350 / 2x500	1x1/0 / 1x3/0
Output	700 (I_r = 1.0)	2x350 / 2x500	1x1/0 / 1x3/0
Battery	1600 (I_r = 0.9)	4x500 / 5x500	1x4/0 / 1x350

Recommended Upstream Protection and Cable Sizes for 625 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	1000 (I_r = 1.0)	3x400 / 3x600	1x2/0 / 1x4/0
Bypass	800 (I_r= 1.0)	2x600 / 3x400	1x1/0 / 1x3/0
Output	800 (I_r = 1.0)	2x600 / 3x400	1x1/0 / 1x3/0
Battery	2000 (I_r = 0.9)	5x500 / 6x500	1x250 / 1x400

Recommended Upstream Protection and Cable Sizes for 750 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	1200 (I_r = 1.0)	3x600 / 4x500	1x3/0 / 1x250
Bypass	1000 (I_r = 1.0)	3x400 / 3x600	1x2/0 / 1x4/0
Output	1000 (I_r = 1.0)	3x400 / 3x600	1x2/0 / 1x4/0
Battery	2500 (I_r = 0.9)	6x500 / 7x600	1x350 / 1x600

Recommended Upstream Protection and Cable Sizes for 800 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	1600 (I_r = 0.8)	4x400 / 4x600	1x4/0 / 1x350
Bypass	1000	3x400 / 3x600	1x2/0 / 1x4/0
Output	1000	3x400 / 3x600	1x2/0 / 1x4/0
Battery	2500 (I_r = 0.9)	6x500 / 7x600	1x350 / 1x600

Recommended Upstream Protection and Cable Sizes for 1000 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	1600 (I_r = 1.0)	4x600 / 5x600	1x4/0 / 1x350
Bypass	1600 (I_r = 0.8)	4x400 / 4x600	1x4/0 / 1x350
Output	1600 (I_r = 0.8)	4x400 / 4x600	1x4/0 / 1x350
Battery	3000 (I_r = 1.0)	8x500 / 9x600	1x400 / 1x600

Recommended Upstream Protection and Cable Sizes for 1100 kW UPS

NOTE: For a 1250 I/O cabinet, it is preferred to use flexible copper power cables with as small a diameter as possible. The number of power cables needed for this kW rating will make large and inflexible power cables more difficult to install.

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	2000 (I_r = 0.9)	5x500 / 6x500	1x250 / 1x400
Bypass	1600 (I_r = 0.9)	4x500 / 5x500	1x4/0 / 1x350
Output	1600 (I_r = 0.9)	4x500 / 5x500	1x4/0 / 1x350
Battery	3000 (I_r = 1.0)	8x500 / 9x600	1x400 / 1x600

Recommended Upstream Protection and Cable Sizes for 1250 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	2000 (I_r = 1.0)	5x600 / 6x600	1x250 / 1x400
Bypass	1600 (I_r = 1.0)	4x600 / 5x600	1x4/0 / 1x350
Output	1600 (I_r = 1.0)	4x600 / 5x600	1x4/0 / 1x350
Battery	4000 (I_r = 0.9)	9x600 / 11x600	2x250 / 2x400

Recommended Upstream Protection and Cable Sizes for 1500 kW UPS

	Maximum OCPD (A)	Cable size per phase (AWG/kcmil) Copper / Aluminum	EGC cable size (AWG/kcmil)* Copper / Aluminum
Input	2500Long-time setting (I_r) = 1.0*	6x600/ 8x600	1x350 / 1x400
Bypass	2000Long-time setting (I_r) = 1.0*	5x600/ 6x600	1x250 / 1x350
Output	2000Long-time setting (I_r) = 1.0*	5x600/ 6x600	1x250 / 1x350
Battery	5000*	11x600/ 14x600	1x700 kcmil/ –