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110 volt leads have no neutral, both line and neutral is live, so with 110 volt you have line 1 and line 2 so in theory core colours brown, black, green/yellow however never seen those colours used. The biggest problem with a 110 volt extension leads is overloading and melting due to using yellow bricks which can supply 50 amp without blowing fuse line to earth. So the lead causing the short say crushed with scaffold pole is easy found, but the lead supplying that one may have melted and the cores while in the cable can dissipate heat better than cores where the yellow outer has been stripped back, so you have to open either a plug or a socket to check, I hated 110 volt leads as so time consuming to test them.
It is the same with the yellow brick, have to remove lid to check, as 50 amp can do such damage. As to sites where there are no yellow bricks and there is a twin pole MCB on each outlet, than visual without removing plug may be considered OK, but can you be sure those leads have never been used with yellow brick transformers?
If your tester is not designed for 110 volt, then maybe a plug in tester
would do a better job, at the end of the day your signing to say the item is safe to use, I am sure we all take chances, or should we call it a risk assessment! And we also have to know when to fold, I had this with vending machines, the boss wanted me to test them, I said without access to inside the machine and a manual I could not test them, they did not belong to us, so the contract was worded so the supplier was reasonable for all testing and maintenance. It was on our register, but said against it tested by name of firm.
The inspection and testing of in-service electrical equipment requires when it is taken out of service it is entered on the repair register and once repair noted on the equipment register, this can mean more than one firm doing the testing, and of course more than one person, the big problem we found using Robin software, so some one would forget to log onto the machine, so the person who used it before was logged as being the tester. It was found using VB one could access and correct the records, but that also means if some one makes an error they can change the record to show some one else had done the testing.
After the foreman was caught falsifying the records, it was decided the computer record was not good enough, so at end of testing, the results were printed in short form so many items on one page, and the pages signed and filled, the file was marked wanted until and a date 5 years in future, they were never looked at, but because they existed, no one tried to falsify the records again.
Testing the odd item is OK, but a day testing I hated, I timed the machine doing a class I item, for it to go through it's automated process took 3.8 minutes, so 8 hours divided by 3.8 = 126 so that was the maximum one could test in a day, removing a plug top to check a fuse size or for burnt cables means doing a good job than around 50 items a day, but people cheat, and one sees lists where 200 items have been tested in a day. OK test a PC and the lead set and computer are tested together so one test but two items, and class II are also faster, however try telling the boss it's not you being slow, it's the others cheating. So spending 10 minutes after a repair to test and enter item back on in service register is OK, a day doing nothing but testing is not, and with 0.75 mm² lead sets, you would not believe how many 13A fuses had to be swapped for 3A, either some one was nicking the 3A fuses and replacing them with 13A, or no one else ever checked fuse size.
Anyway good look with the exam.
It is the same with the yellow brick, have to remove lid to check, as 50 amp can do such damage. As to sites where there are no yellow bricks and there is a twin pole MCB on each outlet, than visual without removing plug may be considered OK, but can you be sure those leads have never been used with yellow brick transformers?
If your tester is not designed for 110 volt, then maybe a plug in tester
The inspection and testing of in-service electrical equipment requires when it is taken out of service it is entered on the repair register and once repair noted on the equipment register, this can mean more than one firm doing the testing, and of course more than one person, the big problem we found using Robin software, so some one would forget to log onto the machine, so the person who used it before was logged as being the tester. It was found using VB one could access and correct the records, but that also means if some one makes an error they can change the record to show some one else had done the testing.
After the foreman was caught falsifying the records, it was decided the computer record was not good enough, so at end of testing, the results were printed in short form so many items on one page, and the pages signed and filled, the file was marked wanted until and a date 5 years in future, they were never looked at, but because they existed, no one tried to falsify the records again.
Testing the odd item is OK, but a day testing I hated, I timed the machine doing a class I item, for it to go through it's automated process took 3.8 minutes, so 8 hours divided by 3.8 = 126 so that was the maximum one could test in a day, removing a plug top to check a fuse size or for burnt cables means doing a good job than around 50 items a day, but people cheat, and one sees lists where 200 items have been tested in a day. OK test a PC and the lead set and computer are tested together so one test but two items, and class II are also faster, however try telling the boss it's not you being slow, it's the others cheating. So spending 10 minutes after a repair to test and enter item back on in service register is OK, a day doing nothing but testing is not, and with 0.75 mm² lead sets, you would not believe how many 13A fuses had to be swapped for 3A, either some one was nicking the 3A fuses and replacing them with 13A, or no one else ever checked fuse size.
Anyway good look with the exam.
