Aclara MTU, Руководство по установке

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M T U I n s t a l l a t i o n G u i d e l i n e s
19
W
IRING
All wiring must be consistent with the wiring provided with the MTU and adhere
to local and national codes.
Cable Insulation
Most MTUs are shipped with black cable insulation. Dual port MTUs, however
will have two cables: one with black insulation and one with gray insulation. The
black inulated cable is for port 1, and the gray insulated cable is for port 2.
Wire Length
MTUs are provided with a standard wire length of 12 feet. If necessary, additional
wire may be used to extend the range between the meter and the MTU up to 500
feet. (Some meters require shorter wire lengths. Please refer to the meter
manufacturer’s documentation for exact limitations.) Always use cable of with 22
AWG solid copper wire, preferably with similar insulation coloring when
extending the wiring.
Wire Routing
All wiring should be secured every 18 inches and before and after every change in
direction. Wiring routed along wood or drywall should be secured with 9/16"
rounded-crown staples. Wiring routed along masonry walls should be secured
using appropriate wire clips. The MTU cable should be allowed to move slightly
within the staples or wire clips.
All changes in wire direction should only be made at right angles. Wiring should
run parallel to ceiling joists, when possible. If joists must be crossed, the wiring
should cross the joists at right angles.
If wire clearance holes are needed to route wire from the meter to the MTU, use a
¼" drill bit. The installer is responsible for the selection of an appropriate location
for any hole to be drilled.