1.6 KiB
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Earthing
Where a safety earth has been fitted, it must not be removed. If changes are necessary, a competent professional must be consulted.
Plugs, fuses and circuit breakers
Need to know the plug colours:
| Colour | Cable |
|---|---|
| Live | brown |
| Neutral | blue |
| Earth | green and yellow |
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The flex of the plug cable should be secured.
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The fuse must match the plug
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A fuse comprises a thin wire that melts when excessive current flows through it, breaking the circuit. When a fuse blows, you should investigate the cause and not just blindly replace especially if it is recurrent.
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Better than a fuse is a Residual Current Circuit Breaker with Overcurrent. This can detect currents to earth of over 30mA whereas a fuse just captures a few amps and only detects short circuits.
General points
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Only work on the inside of equipment, having first disconnected the power source
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Have a master switch for all radio equipment
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Safety measures must be taken when using radio equipment outside
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Wear protective goggles when soldering
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Very high antennas require lightening protection
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Antennas and feeders must not be sited close to overhead cables
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A ladder should be used at a 4:1 height to base ratio and be used with an assistant
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The main health damage from EM radiation is heating of body tissue, especially the eyes
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Antennas and other conductors must not be touched when transmitting
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Antennas must not be mounted in such a way that people would accidentally come into contact with them
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You must not look down a wave guide