Installation manual

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
13
Figure 4: UT340 and UT360 Installation Wiring Diagram, Typical Installation
NOTE 1:
Size the mains input overcurrent protection
device per applicable codes. See the table below for
mains input volta
g
e and current ratin
g
s.
Mains Input
UPS Model VAC Maximum Amps
UT340 208 200
UT340 480 86
UT360 208 301
UT360 480 130
NOTE 2:
(a) Refer to an
y
instructions provided with the
DC disconnect (DCD) and pre-char
g
e/dischar
g
e box.
(b) The pre-char
g
e/dischar
g
e box must be located less
than 10 feet (3 meters) from the DC disconnect.
ADDITIONAL NOTES:
A qualified electrician must install the UPS accordin
g
to all applicable codes.
All power and control wires must be in separate
conduits.
The
g
roundin
g
electrode conductor (protective
earth—PE) must be the same size (ampacit
y
) as the
UPS input circuit conductors. Conduit is not an
acceptable
g
roundin
g
electrode conductor—see
National Electrical Code Section 250-91(a).
A UT340 or UT360 unit is wired from the factor
y
as a
separatel
y
derived s
y
stem. Output neutral is bonded to
equipment
g
round throu
g
h main bondin
g
j
umper inside
the UPS. See National Electrical Code Article 250-5(d)
and 250-26 for proper installation
g
roundin
g
.
If
y
ou do not have a BEST-supplied maintenance
b
y
pass cabinet (MBC),
y
ou must provide overcurrent
protection and UPS input AC disconnect means.
The maintenance b
y
pass switch must be a 4-pole
device which switches all three phases and neutral. If
y
ou are usin
g
a 3-pole device, contact BEST’s
Technical Support Center for instructions to convert the
unit to a not-separatel
y
derived s
y
stem.