Safety Tips

As part of our service to our customers, we have compiled a few solutions and safety tips for you to bear in mind when working with electrical devices.

Safety Tip 1: How to check for, and change, a blown fuse

Safety Tip 2: What to do if you have a Safety Switch that is tripping

Safety Tip 3: Old Wiring Click on each tab below for detailed instructions on what to do.

Safety Tip 1

Safety Tip 1: How to check for, and change, a blown fuse

Here is what you do if you have a fuse switch board similar to these:

 

 

 

 

and you have lost power to your power points, or lights etc.

The purpose of a fuse is to limit the current draw on the sub-circuit it provides protection to, so an over current draw does not damage the wiring of the circuit, the fuse element (wire) will rupture (blow) if an over current takes place. This could be caused by simply using to many appliances at once or if a short circuit occurs.

To check if a fuse element has ruptured (blown) follow this suggested sequence:

 

 

 

 

 

 

 

 

 

 

 

 

 

To replace a fuse element, firstly ascertain what it protects as this will determine the size of wire to be used. Generally the sizes are as follows:

  • Lights – 8amp
  • Power – 15amp
  • Stove – 32amp
  • Hotwater – 20amp

Now you know what size fuse wire to install insert one strand of the wire through the fuse and attach at the screws, making sure no excess wire is hanging off the screws, it should look similar to this:

 

 

 

 

Please remember that the fuse is a Safety Device. Never install:

– the wrong size wire
– more than one strand of fuse wire
– any wire except fuse wire.

Download the PDF version of this checklist.

Safety Tip 2

What to do if you have a Safety Switch that is tripping Safety switches come in basically three types being, switch board mounted, power point mounted or on an extension lead, they will probably look similar to these:

Safety switch extension lead

 

 

 

 

 

 

Safety switch – powerpoint

 

 

 

 

 

 

Safety switch – switchboard

 

 

 

 

 

 

The function of a safety switch is to protect against electrocution and therefore save lives by detecting a leakage of current to earth. They are usually calibrated to trip at 30mA of earth leakage with a tripping time of 1millisecond.

But it is not a substitute for common sense and we must always remember to be safe with electricity, never use appliances with frayed or damaged leads. If an appliance is identified as faulty do not use it until it has been repaired by a qualified person.

To restore the power if your safety switch has tripped follow this suggested sequence:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Please remember that a safety switch is a Safety Device. You should:

– never use appliances suspected to be faulty;
– always practice safe use of appliances;
– never use appliances near water.

Test your safety switch every month to ensure it is working, by pressing the test button, this simulates an earth fault!

Download the PDF version of this checklist.

Safety Tip 3

Old Wiring If you are going to go under your house or into the roof space you should be aware of exposed electrical wiring caused by either old age, rodent damage or substandard wiring practices. Its always a good idea not to touch the wiring system and to turn off the main switch to ensure your safety, particularly if you have old electrical wiring enclosed in steel conduit (similar to the photos below), as the joints of the old conduit are sometimes not intact, and there is no continuity of the earthing provided by the steel conduit.

 

 

 

 

If you are unsure of the safety and condition of your electrical installation contact us to carry out a safety inspection.

Download the PDF version of this checklist.