Hi JW, That Ferranti clamp meter brings back some memories. Back when I was a 2nd year apprentice, my boss put me on-call, now I only had an orange set of Duspols and a multimeter, as that was all I could afford on the wages of the day. I was loaned one of them Ferranti clamp meters and one of (I think) the original wind-up 500V Megger test instruments. Even in 1987, these instruments looked like they had been resurrected from the tomb, but hey, not once did they fail me, I sorted out a lot of problems with these two instruments by themselves, until I could eventually afford my own gear. Some months later, a newer apprentice dropped the clamp-meter onto a concrete floor and it shattered into a million pieces, we were all pretty peeved about this, it was like the death of a close friend.

Excellent tutorial on clamp meter which is always needed. Keep the great work up.

I bought one of these 10 years ago and I thought it was faulty as I was testing on multiple wires ie just what you cleared up, LN&E. Silly me! thanks for your great generous videos.

Clear and instructive, thank you.

Thanks for the video I had a question on my test about looping 4times in a clamp ammeter this answered my question

thanks again for your good work John

Great video, thanks!!

thankyou!!, I need to simulate very high current in a safe way, looping the wire will will WORK.

Thanks for the information.

Any thoughts or tests on the Fluke non contact "clamp" meters ? Like the T6-600 ?

could you do a video about grid fused spurs or how to apprach a kitche where multi fused spurs are required. also video on different types of cable and sizes to use for what starting with domestic e.g outdoor indoor use.

Not sure if you know this but fluke makes a clamp on meter now that will read voltage through the clamp part

Very nice. Thank you.

Beautiful

Hey John.. !! kindly help me bro i am gonna for buy Meco 1008 trms clamp multimeter. does it better then UNI-T UT 203 and in same price others ? kindly tell me it's urgent?

Excellent Tutorial JW , would you have a video on the 2 Pen uni-t ut15c volt tester, wondering if its any Good??

Hi John. Why don't high quality Clamp meters have HRC fuse protection like their multimeter counter parts ? Even fluke doesn't seem to fuse clamp meters even though they measure voltage Any information on this would be excellent

a lot of people would like to see an old simpson meter demo.old electricians didn't have all the tools of today,good video,

Hi John as I'm not qualified would I be permitted to run cables to position and connect things like sockets or ceiling roses under part p thanks

Maybe a childish question here but at what point does the N become without voltage in a circuit. Assuming the are 2 present loads on a single circuit and I took a reading of N and E after the second would that then be zero voltage

Nice one. That Ferranti 'tong' meter meant business. Easily safe for Cat. VIII (!) Even with the plug-in devices available, it's a pity that no one seems to have found a way of measuring the current in a flex containing both L + N conductors. Unless it just isn't considered to be worth the R & D.

How accurate are these devices taking into account that the magnetic permeability differs from wire to wire depending on the type and thickness of the isolation used? Thanks!

Hi John, how do I contact you with bits and pieces, you doubtless have noticed I be tended to contact you via the video comments section, is there another way? I actually have a question if I might seek your opinion, kind regards Warren

where is best to get a uk line splitter or monitor tool suitable for clampmeter and small currents.

What would you need to use a clamp meter for in a domestic installation? really great videos, thanks for taking the time to make them.

if you measure line and neutral and get a reading isn't that a sure sign of current leakage? as they aren't canceling each other out?

Thought you were going to take it one step further John and show the new ones that measure DC current.

Some of the old clamp meters were just a moving iron movement, the magnetic field of the wire did all the work. I used to have two like that one went to 30 amps and the other was 400 and 800 the ranges were made by a stand off bracket on the back of the meter the furthest out being the higher range. Might still have them in the shed somewhere.

I'm a newbie, recently bought the cheapest most useless single gang extension plug with no actual extension. Just enough to remove enough insulation and split the wires for a clamp. I did for a second think the meter was faulty when I tried it on full power cable. Didn't take me long to realize in fairness

General question: On a DC clamp meter, does shielding around the wire influence the measurement?

How do the open ended meters work

When measuring DC,why do u get two different readings if u turn the clamp meter around?

Why can't you use a single probe like the clamp but smaller range. Contact probe so it's maximum closeness not conducting to circuit. Are 2 probes always required for bridging circuit. Couldn't pass load in and out of single probe in single contact point

I'm setting up a DIY woodwork shop and want to measure the current each machine is drawing. I was thinking of getting a clamp meter like the one in this video BUT at 8.14 in this video you referred to 'one of those monitor things you can just plug in....because they are fairly readily available'. If that is what I need to get, please let me know what it is. Thanks

I'm sure that AVO brought out an 'add-on' clamp module that could be plugged into the ampere terminals of a standard multi-meter. . Very simple device to contstruct really and totally safe to use. Also the British Gas - Energy efficiency display module, that is available to anyone, but comes free with a contract, uses the same technology, as one has to place a current sensing coil around the line tail from the house meter to the consumer unit. This coil, in turn, feeds a wi-fi transmitter, that talks to the display module. The display does not show amperes however, but gives a reading in watts. . Many (uninformed) have been caught-out trying to read the current flow in a multiple conductor AC flex...lol

Ya made that mistake John thought it would tell me what power in plug wire to tools

....... Ferranti stolen from Dr. Frankenstein's lab.

Save your money and buy one from uni-t they are the same and just as good as well as a dam lot cheaper I have used uni-t test instruments for seven years now with out any problems and I will not be going back to the big brands any time soon

Sir plz can you say how to check that the neutral coming from transformer is weak or strong?🙏🙏🙏

J.W. !!!!!!!!!!!!!!!!! Crackin video mate, but slow down and enunciate a little clearer, Sir, Thank You 🙄

Just use common SENCE PEOPLE think about that a while

how much do you pay ????

Ah thast's not true you too ???

Analo Analogue = style .... digital maybe more accurate but = Zero ....