3 phase DB's: the older, the more dangerous 👀
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- Опубликовано: 22 сен 2024
- In this video, I take a look at a Merlin Gerin and a Federal Electric 3 phase DB to compare the difference in safety. I also ramble on about types of mcbs and how they fit and if things have got safer due to accidents or decline in skillz.......
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As an apprentice, just wanna say your videos are gems and mega helpful. Cheers again John
Very interesting learning history side of things, as a apprentice I find your videos very educational and appreciate you taking the time to upload them! 👍👍
@jamess9902 cheers mate 👊
Hi John another great and interesting video always look forward to them
Another fascinating video. Thank you. Keep them coming.
@De_Chaos cheers mate 👊
The Federal fuseboard was called stablok as the circuit breakers literally pushed into a slot & locked onto the busbar
One of the main reasons things got "safer" - and more standardised - was that industry went from employing it's own technicians to using external contractors...
For a long time, most industrial sites had their own plumbers/mechanics/sparks etc. who trained their own apprentices - so they learned what to do and NOT to do SPECIFICALLY for the stuff they'd likely spend their entire life working-on - they inherited systems and developed them personally - 'safety' came from familiarity, not from safety devices and stickers
The move away from 'in house' technical staff created a need to train people to work on a MUCH wider range of systems and setups and so there became a need to standardize - as much to keep costs low, you don't want someone spending hours just figuring things out (yes, money ahead of safety!!)
Always worth remembering that early electrical installations were entirely UNINSULATED - they literally ran bare copper into light fittings in people's houses - we've come a long way...
At southampton uni in the late 80s, we had hundreds of the FE stablok boards, never saw ONE connection go bad.
the same design of board was used in the US under the federal pacific electric brand, they were made to a really stupid US standard that didn't require a magnetic disconnect, and got a really bad name, but the busbar connections never failed, to my knowledge. Similarly i've never seen a starbreaker go bad
When i was a YTS lad at aforementioned uni, Merlin Gerin was the new hot stuff, so you're right about dating them
The open closed problem is real as they haven't removed the stickers saying what way around open and closed are at the bottom! Had a customer really confused by this and said a breaker was on when it was off, I went out to look at why a potwash wasn't working and it was just a tripped breaker caused by a single phase power cut.
They’ve just installed them backwards (the new ones). There’s no reason for them to be in the board backwards since they’re just comb rails in regular cage terminals, same as on the outboard side. As far as I can see from this video.
There’s no safety issues with that *apart* from the switches going the wrong way, but… should still be fixed since it’s easy.
@@JasperJanssen they are on the wrong way around for all the breakers on the board I was talking about....
@JasperJanssen so I had a closer look and the 3871 one's have the din rail release on the opposite end to the 60898 one's. So if they put them in the correct way it would be near impossible to release the mcb from the din rail. So I can only assume that was the reason for fitting them the opposite way 🙃 makes a headache to work on though!
The 2 schneider`s are fitted the wrong way round
that 70s one looks like a brand spankers new American board
@Riggersa Yea the American DBs look real old and industrial looking compared to our stuff. But I prefer the chunky mcbs in the old Federal Electric DB. Feels like you're switching something important lol
Left to right for numbering IMO. Bottom up is absolute heresy. Jamie's way is ok but I'd rather stick with what I know and "the norm".
Wonder if it’s the prime colours ie red yellow blue
@richardcawrey I'm not sure why they decided the colours but I prefer the old colours. I find it far easier to distinguish each phase on the old system. The new colours are very similar on a dark site connecting something up.
Interesting comparison of those boards. Mate, you need to move your camera a little more smoothly. Otherwise, we get seasick watching your vids. 🤣🤣🤣