1
5
9
3
7
11
2
6
10
4
8
12
13
14
1
2
4
5
3
A
B
Q4 Q2 Q1Q3
20
7 – Wiring (continued)
7-7 AC Input/Output Wiring (Single UPS)
After de-energizing all input and output (AC and DC) of the UPS •
system, remove the terminal block cover from the UPS system.
If you did not connect the ground cable in • Section 7-6, connect the
UPS system’s grounding terminal
A
to your facility’s earth ground
B
with a 4 AWG (5.189 mm) ground cable. Keep the ground cable
connected at all times after installation.
Remove the UPS system’s front bezel to expose the circuit •
breakers. First, confirm that the main input circuit breaker switch
Q1
and the bypass input circuit breaker switch
Q2
are both off.
Second, confirm that the manual bypass circuit breaker switch
Q3
is off. Third, confirm that the output circuit breaker switch
Q4
is
off.
Confirm the phase of each cable, then connect the cables according •
to the UPS system terminal block diagram in Section 7-3. See
Section 7-5 for cable size requirements. Cabling should be
protected by flexible conduit and routed through the appropriate
knockouts in the terminal block cover. Warning: Observe proper
phase rotation by connecting R to R, S to S, T to T and N to N.
Failure to observe proper phase will damage the UPS system
and create a risk of personal injury and property damage.
Replace the UPS system’s terminal block cover.•
1
2
3
4
5
