NV10LT/NV7.5LT INSTALLATION MANUAL CONNECTING AC POWER
PAGE 2.5.2 VERSION 5.0 2021-03-01
6. Verify that the station reference ground is connected to the ground stud at the back of the cabinet.
See Section 2.4, “Connecting to Station Reference Ground” on page 2.4.1, if necessary.
7. Route the main ac power cables through the top or bottom ac entry hole.
NOTE: The NV10LT/NV7.5LT contains pre-installed ferrite toroids for internal ac wiring. For this reason,
additional ferrite toroids should not be required for the ac input wiring. The ancillary kit contains ferrite
toroids (Nautel Part # LP32) for use with the ac input wiring, if desired.
8. Route the ac power cables to the vicinity of the ac input terminal block (TB1):
For top entry, Nautel recommends you route cables through the built-in conduit (channel) on
the left-hand side of the cabinet (see channel entry and exit points on Figure 2.5.1 on page
2.5.4; conduit dimensions are 2-1/16 inches x 3/4 inches). Ensure there is wear strip at the
channel entry and exit points to protect the cable insulation from wearing. If your ac wiring
will not pass through the channel, route it along the outside of the channel using the provided
tyrap anchor holes and secure the cables using Nautel Part # HAC15 snap-mount tyraps (for
0.25” holes), provided in the ancillary kit. The channel exit point is just above TB1.
For bottom entry, route the cables from the bottom entry hole to the input side of TB1.
9. With the main ac power cables near terminal block TB1, cut each wire to the required length and
remove 1.9 cm (3/4 in.) of insulation from the end of each conductor.
10. Connect the main ac power source as follows:
NOTE: The following tools are required for installation (user provided): 3/16-inch, 1/4-inch hex Allen
keys and a suitable torque wrench to tighten ac input wiring.
For THREE-PHASE AC POWER SOURCES, connect the three ac line inputs to terminals 1A (L1),
2A (L2) and 3A (L3) of terminal block TB1. Connect the ac neutral (as required, such as with ac
power source voltages between 303 and 459 V ac) to terminal 4A (N). Connect the ac ground
to terminal 5A. Secure all wires in their respective terminals.
For SINGLE-PHASE AC POWER SOURCES (European/Asian standards), connect the ac line and
neutral inputs to terminals 1A (L1) and 2A (L2/N) respectively. Connect the ac ground to
terminal 5A. Secure all wires in their respective terminals.
For SINGLE-PHASE AC POWER SOURCES (North American standards), connect the two 110 V
ac lines (neutral not required) to terminals 1A (L1) and 2A (L2/N). Connect the ac ground to
terminal 5A. Secure all wires in their respective terminals.
Torque securing hardware on TB1 to 13.6 N-m (120in-lbs) using a user-supplied torque
wrench with a 3/16 inch hex bit.
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