INTERNAL BYPASS SWITCH INSTALLATION
Eaton FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide
S
164201403 Rev B
www.eaton.com/powerquality
48
Installation Wiring Diagrams for Internal Bypass Switches
The following notes are referenced in the internal bypass switch wiring
diagrams (Figure 17 through Figure 20). To determine which diagram is
correct for your site, see Table 21 on page 45.
NOTE 1
The customer must provide input overcurrent protection as stated
in NEC Section 240-21 or local codes. Size the protection device according to
local code requirements.
NOTE 2
To properly install, complete the phase check starting on page 67.
NOTE 3
The customer must provide and install this ground connection
according to NEC Sections 250-20(d), 250-30, 250-62, and 250-64 or local
requirements. This grounding electrode conductor must be at least #8 AWG
(8.36 mm
2
), per NEC table 250-66. If the UPS input circuit conductors are
larger than #8 AWG (8.36 mm
2
), Eaton requires the grounding electrode
conductor to be the same size (ampacity) as the largest UPS input circuit
conductor. Refer to NEC Section 110-3(b). Conduit is not considered an
acceptable grounding electrode conductor. Eaton does not recommend
routing the grounding electrode conductor through metallic conduit. This
conductor may require protection from physical damage according to local
requirements.
NOTE 4
All circuit conductors, including the neutral and equipment
grounding conductors, must be the same size (ampacity) and have the same
rating (75
°
C copper wire), and must be sized according to the input
protection device.
NOTE 5
The customer must provide output overcurrent protection per
NEC Section 240-21 or local codes. Size the protection device according to
local code requirements.
NOTE 6
For maximum protection against electrical noise, use isolated
ground receptacles. Refer to NEC Section 250-146(d) or local requirements.
NOTE 7
For service, the UPS requires 36
I
(91.5 cm) clearance on the sides
and in front, 12
I
(30.5 cm) above the UPS, and 4
I
(10.0 cm) behind the
bypass switch. A minimum clearance of 4
I
(10 cm) is required on the sides,
front, and back and 12
I
(30.5 cm) above the UPS for proper ventilation. See
“Equipment Clearances” on page 20 for clearances before installing the
UPS. Use flexible metal conduit on the UPS or the external battery cabinet
if either must be moved.
NOTE 8
External UPS batteries are optional. The battery cables are
connected to the DC terminals on the DIN RAIL in the UPS. See “External
Battery Cabinet Installation” on page 55 for external battery cabinet
installation.
