vi DDV9150 USER’S GUIDE
10. POWER SOURCES - This video unit should be operated only from the type of power source indicated on the
marking label. If you are not sure of the type of power supply to your home consult your appliance dealer or
local power company. For video units intended to be operated from battery power, or other sources, refer to
the operating instructions.
11. GROUNDING OR POLARIZATION - This video unit may be equipped with either a polarized 2-wire AC line
plug (a plug having one blade wider than the other) or a 3-wire grounding plug having a third (grounding) pin.
The 2-wire polarized plug will fit into the power outlet only one way. This is a safety feature. If you are unable
to insert the plug fully into the outlet try reversing the plug. If the plug still fails to fit, contact your electrician
to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug.
12. POWER-CORD PROTECTION - Power-supply cords should be routed so that they are not likely to be walked
on or pinched by items placed upon or against them, paying particular attention to cords of plugs, conve-
nience receptacles, and the point where they exit from the unit.
13. OUTDOOR ANTENNA GROUNDING - If an outside antenna or cable system is connected to the video unit,
be sure the antenna or cable system is grounded to provide some protection against voltage surges and built-up
static charges. Section 810 of the National Electrical Code, ANSI/NFPA No. 70-1984, provides information
with respect to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an
antenna discharge unit, size of grounding conductors, location of
antenna-discharge unit, connection to grounding electrodes, and
requirements for the grounding electrode. See figure below.
14. LIGHTNING - For added protection of this video unit
during a lightning storm, or when it is left unattended
and unused for long periods of time, unplug it from
the wall outlet and disconnect the antenna or cable
system. This will prevent damage to the video unit
due to lightning and power line surges.