Open & Short circuit

[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!!

 

[telectrix]

try youtube videos by John Ward.

 

[Isaac1993]

try youtube videos by John Ward.

Thank you, I'll have a look now

 

[littlespark]

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

 

[Farmelectrics]

you tube have some interesting videos but invest in the gn3 that's the testing bible

 

[Lister1987]

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.

 

[Eire79]

you tube have some interesting videos but invest in the gn3 that's the testing bible

what is the gn 3 , is it a guide on testing/publication or where can it be got , sorry I'm a Irish poster.

 

[telectrix]

what is the gn 3 , is it a guide on testing/publication or where can it be got , sorry I'm a Irish poster.

guidance note 3. here:
View: https://www.amazon.co.uk/Guidance-Note-Inspection-Electrical-Regulations/dp/1785614525/ref=pd_lpo_14_img_0/261-6089322-8504405?_encoding=UTF8&pd_rd_i=1785614525&pd_rd_r=680e978f-ee8b-42b3-908d-efd77c98b563&pd_rd_w=n8hXV&pd_rd_wg=8fg9U&pf_rd_p=7b8e3b03-1439-4489-abd4-4a138cf4eca6&pf_rd_r=V9CTTXZ9N49ZQK4DNRF7&psc=1&refRID=V9CTTXZ9N49ZQK4DNRF7

 

[Baddegg]

what is the gn 3 , is it a guide on testing/publication or where can it be got , sorry I'm a Irish poster.

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 ?

 

[Zerax]

...and there’s no need to apologise for being Irish mate we welcome every here ?

We even have a few Scottish members...

 

[Baddegg]

We even have a few Scottish members...

Shhhhhhhhh......@baldelectrician will hear ya!

 

[Moley]

I'm Welsh hmmm....3 words!!!!!

 

[DPG]

We even have a few Scottish members...

Only until the next referendum, then they'll be barred.

 

[Lister1987]

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 ?

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 ?

 

[James]

We even have a few Scottish members...

ssshhhh, dont tell anyone but i was born north of the border too.