Nautel NV20LT, Installation Manual

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NV20LT/NV15LT INSTALLATION MANUAL CONNECTING AC POWER
VERSION 4.0 2018-02-26 PAGE 2.5.1
SECTION 2.5: CONNECTING AC POWER
Connect ac power to the transmitter as follows:
NOTE
: The transmitter’s internal wiring is factory configured to operate from the customer’s desired ac
power source. Ensure that the ac configuration label on the transmitter agrees with the main ac power
source voltage that you are connecting.
1. Switch off the main ac power at the service entrance. As viewed from the rear, rRemove the left-
hand side rear filter panel (1/4-turn fasteners) from the transmitter.
2. Select the appropriate wire size for your main ac power cables. See the NV20LT/NV15LT Pre-
Installation Manual for assistance. Ensure the ground wire is insulated, so it does not contact the
transmitter cabinet at any location other than the safety ground stud.
NOTE
: Some types of cable (e.g., TEC cable) have an exposed ground wire. In such cases, Nautel
recommends that you sleeve (insulate) the ground wire.
3. Route the main ac power cables in a suitable conduit, from the ac disconnect switch to the top of
the transmitter.
4. Punch the appropriate size hole in the ac entry box as follows (see Figure 2.5.1 on page 2.5.5 ):

Remove the top cover from the ac entry box. It is secured using four M4 screws and has three pre-cut,
1/4-inch diameter holes.

Use a chassis punch tool (e.g., Greenlee, etc.) to punch the desired size hole(s) in the top cover. Make
sure the ac input cables will pass safely through the hole(s).

Re-install the top cover on the ac entry box using four M4 screws.
5. 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.
6. Route the ac power cables through the hole(s) punched in the top of the ac input entry box to the
ac input terminal block (TB1) (see
Figure 2.5.1 on page 2.5.5 ).
NOTE
:
The NV20LT/NV15LT 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.
7. Temporarily remove the rear cover from the ac input entry box (four M4 screws), noting the cover is
secured to the box with a bonding (ground) wire, which should not be disconnected.
WARNING! ENSURE THAT WIRING SIZES ARE APPROPRIATE. AC WIRING
MUST BE INSTALLED BY A QUALIFIED, LOCALLY-CERTIFIED ELECTRICIAN.