Open & Short circuit

I

Isaac1993

Evening all,

I'm new to this so apologies in advance if I'm posting in the wrong threads.

I'm an apprentice electrician.
Due to the ongoing pandemic, my college assignments are currently being handed out online with very little communication and interaction from the tutors.
I'm struggling with one section of an assignment. I have tried contacting my tutor, but have yet to receive a reply, so have come here to see if I can pick up advice or pointers that might help me out, so I can get the work completed.
The section I'm struggling with asks:
Describe the process of testing for (Include tester type and expected readings)
  • Open Circuit
  • Short Circuit


Having just started the 'Faults' unit before the college closed, and not having covered this area, I'm finding it difficult to find the correct process of these tests.
I have tried online but all I'm seeming to find is information about auto electrics.

Any help would be very appreciated

Hope everyone is keeping safe and well!!
 
If you understand the wording “short” and “open” circuits, and know what you should expect between wires in a particular circuit.

using an MFT, you are either testing for insulation resistance, or continuity.
insulation resistance, you’re looking for the highest value possible (mega ohm range)
Continuity, looking for lowest. (Single digit ohms)
Anything in between suggests the fault you’re looking for.... but generally it’s an open circuit or short circuit where there shouldn’t be one.

fault finding is testing on a dead circuit. So there’s no need to use an rcd tester or earth loop
 
Join the trainees section, likeminded students in there, as well as mentors. Drop @Dan a pm and get in, also as mentioned; get on YT and watch a few John ward videos on the subject.
 
 
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Eire79 said:
what is the gn 3 , is it a guide on testing/publication or where can it be got , sorry I'm a Irish poster.
Click to expand...
Guidance note 3 mate, read it then read it again and agian and agian........and there’s no need to apologise for being Irish mate we welcome every here ?
 
Baddegg said:
Guidance note 3 mate, read it then read it again and agian and agian........and there’s no need to apologise for being Irish mate we welcome every here ?
Click to expand...
It's the Scousers you've gotta watch for, so tight fisted that you won't find your car on bricks, you'll just find it without wheels, courtesy propping be damned ?
 
Lister1987 said:
It's the Scousers you've gotta watch for, so tight fisted that you won't find your car on bricks, you'll just find it without wheels, courtesy propping be damned ?
Click to expand...
says him from warrington. can't make up his mind if he's a Scouser or a manc. :sunglasses: :sunglasses:
 
Vortigern said:
I am not implying anything about you and sheep or romance or anything like that but your avatar is a sheep and you say you are welsh. Do you have waders by any chance?:D
Click to expand...
It's funny that you should mention them, I was looking at them a few minutes ago....
 
What's a closed circuit? a complete circuit it's closed /complete - continuous.

What's a open circuit? it's open it has a opening in it, it's not continuous.

How would you check a circuit was continuous? You check it's continuity - you do a continuity test.

What meter do you use for a continuity test?.......

What's a Short Circuit? Taking a shortcut skipping the load example Line and Neutral coming into contact skipping the load.

What might cause Line and Neutral to come into contact? a break down of insulation

How do check insulation? Insulation Resistance test.

what meter do you use?......

you can actually use either meter to check either fault but thats not 'technically' right and an earth fault is basically just a short circuit but again that's another story hope that helped.

if not meh :)
 
telectrix said:
says him from warrington. can't make up his mind if he's a Scouser or a manc. :sunglasses: :sunglasses:
Click to expand...
Neither thank christ, still maintain my westcountry twang and i'll be damned if im gonna lose it anytime time lad.....i mean me lover GAAAAHHHHH I'm off to mow down some scousers in me combine 'arvester :p
 
Moley said:
I've actually got a pipe. Bought it off ebay specifically for pointing at things in that 'point at it with a pipe' way.
Click to expand...

All you need now is a mantle piece to lean on whilst exchanging fireside stories.
 
I can’t shake this image of a Welshman in waders a smoking jacket waving a pipe about....with a knackered sheep in the corner! ?
 
Lister1987 said:
Does the experience include ladies with a proclivity for not wearing clothes, gyrating round a pole to some rather thumping music. ...or. I thinks by a different gentleman's club experience?
Click to expand...

How coarse.

Words.
 
Isaac1993 said:
Evening all,

I'm new to this so apologies in advance if I'm posting in the wrong threads.

I'm an apprentice electrician.
Due to the ongoing pandemic, my college assignments are currently being handed out online with very little communication and interaction from the tutors.
I'm struggling with one section of an assignment. I have tried contacting my tutor, but have yet to receive a reply, so have come here to see if I can pick up advice or pointers that might help me out, so I can get the work completed.
The section I'm struggling with asks:
Describe the process of testing for (Include tester type and expected readings)
  • Open Circuit
  • Short Circuit


Having just started the 'Faults' unit before the college closed, and not having covered this area, I'm finding it difficult to find the correct process of these tests.
I have tried online but all I'm seeming to find is information about auto electrics.

Any help would be very appreciated

Hope everyone is keeping safe and well!!
Click to expand...
An open circuit is where there is a break in the conductor and a short circuit is where a live and earth are touching or live and neutral etc ie where the electricity is not taking the correct path but a SHORTER circuit.
 

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Isaac1993

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If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
United Kingdom
What type of forum member are you?
Trainee Electrician

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Title
Open & Short circuit
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Electrical Testing & PAT Testing Forum
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circuit open circuit short short circuit testing

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Baddegg,
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