Intermediate Course (9 ) Safety Karl Davies. East Kent Radio Society EKRS. Remember the Foundation Slides. Soldering - Safety Issues (Part 1). 3. The soldering iron stand is a safe place to keep the iron when hot. This minimises risk of skin contact and burns.
East Kent Radio Society EKRS
Goggles or suitable glasses should be worn when soldering to prevent solder splashed and spitting flux causing eye damage.
Note: This will also be mandatory on this course.
1 MetreLadders - Safety
Take care when erecting ladders etc.
The correct angle can be expressed as a 1:4 ratio
Ladder should be suitably secured at the top or held at the bottom by an adult.
Over-reaching can cause a fall or cause the ladder to slip, rotate.
Use a tool belt to carry tools this will help prevent falling objects.
Wear hard hats when working at height or when others are working at height.
Electric shock can result from Antennas and Ladders coming into contact with, or arcing from overhead power lines.
Even wooden ladders are dangerous in this context.
A wet wooden ladder will conduct electricity.
Antennas and feeders must be kept well clear.
Feeders / antennas must be soundly fixed in case of being accidentally being pulled, high winds, icing, bird strikes
Ensure shack equipment is run from a common mains earth to prevent earth loops - use filtered mains boards and ferrite rings correctly.
Modern Gas & Water Pipes can give high resistance earth.
Beware of House earths above earth potential
Do not mix Mains Earth (for safety) with RF Earths (for Antennas)
Avoid trailing mains leads on the shack floor - Trip Hazards!
Same as for Foundation.
Damage to self.
Damage to Equipment.
Cost of Replacement / Repair
The fuse must blow first.
Not all faults are short circuits.
So the fuse must blow before causing a fire.
Either in the cable or the equipment.
A 1 Amp panel mounted fuse may protect the equipment, but what fuse is in the plug to protect the cable?
Recall P=VI or I=P/VFormula for correct fuse is Current = Power/230.
A 1A current passing through the body may well be fatal before the fuse blows.
The shack should be protected by an RCD and a well knownOFF switch, known to all in the house.
These operate much faster than a fuse and are much more sensitive to fault conditions hence providing better protection against electrocution.
Any external use of mains power MUST use an RCD.
Lightning - Disconnect your Antennas !
A nearby strike can also be dangerous to you / equipment.
Aresidual-current device (RCD), similar to a residual current circuit breaker (RCCB), (formerly known as an Earth leakage circuit breaker or ELCB) is an electrical wiring device that disconnects a circuit whenever it detects that the electric current is not balanced between the energized conductor and the return neutral conductor.