Motorola Canopy Powerline MU - Manual (Page 23)

Powerline MU
Page 23 of 112
Commercial building installations will fit in one of the following categories:
•
Mass Metered
•
Individually Metered, single or three-phase
•
Multiple Transformer
4.2.1 Mass Metered
Mass-metered electrical distribution is typically found in hotels, dormitories, and some
older apartments. These have one meter where the power enters the building, followed
by a large distribution panel that distributes electricity to other smaller sub or breaker
panels, to the rooms or a combination of both.
You must have a qualified electrician install an AC outlet for each low-voltage phase in
the electrical panel for the building. This can be up to three phases.
In the UK and Ireland, former codes required a two-meter distance between outlets on
different phases. While this is no longer considered necessary, some electricians may
prefer that installation. If so, to accommodate the length of the injection cords, install the
outlets in a triangular design so that the Gateway is in the middle and post a caution sign
that the outlets are for use with the Powerline MU Gateway only.
Place the Gateway on a secure table or shelf, or mount it in a rack or on a wall or board.
Plug a capacitive injection cord from each phase outlet to the phase jacks in the
Gateway. (The capacitive injection cords are power cords, but they do not draw
power.)
Plug a power cord from the AC Power jack in the Gateway to an AC outlet (see
illustration).
Figure 7 Mass-metered installation