Grounding or polarization, Ground loop warning, Lightning and power surges – FOCUS Enhancements MR-HD100 User Manual
Page 9: Power lines
MR-HD100 Media Recorder
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• Non-Use Period
During extended periods when the device is not used, unplug
it from the power source and retract the power-cord.
Grounding or Polarization
• Polarized
If this product is equipped with a polarized alternating current
line plug (a plug having one blade wider than the other), it will
fit into the 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 should still fail to fit, contact your
electrician to replace your obsolete outlet. Do not defeat the
safety purpose of the polarized plug.
• Grounded
If this product is equipped with a three-wire grounding type
plug, a plug having a third (grounding) pin, it will only fit into a
grounding type power outlet. This is a safety feature. If you
are unable to insert the plug into the outlet, contact your
electrician to replace your obsolete outlet. Do not defeat the
safety purpose of the grounding type plug.
Ground Loop WARNING:
To avoid earth or ground loops, insure that all equipment
connected to the MR-HD100 share a common ground. Use a
single, grounded outlet strip as opposed to separate outlets with
the possibility of different ground potentials.
Lightning and Power Surges
During electrical storms or when left unattended and unused for
long periods of time, unplug the MR-HD100 from the power
source and disconnect the antenna or cable system.
Power Lines
Do not locate an outside antenna system in the vicinity of
overhead power lines, electric light or power circuits, or where it
can fall onto such lines or circuits.
When installing an outside antenna system, extreme care should
be taken to keep from touching such power lines or circuits as
contact with them might be fatal.