Very good standard of work there
Thanks, I try (or as I said, used to try). Used to get people saying I'm very trying ?
One thing that always puzzled me about data cables was multicompartment pvc trunking
It's functional but it's designed to parallel mains and data cabling which isn't really what you want to be doing
It's quite common for dado trunking etc. TBH it's not that big of a problem as many uses (ethernet, phone) is designed to be interference tolerant - twisted pairs using differential signalling. The main thing is the physical segregation for electrical safety which was certainly part of the rules for phone cabling when that side of things started getting deregulated.
My biggest bugbear is where the sparkies do all the containment but simply don't care and don't think about the space needed. One job I recall, the guy's work was very good - nice and neat. But he was clueless about a few things which showed that he was really just doing it by the numbers. And he had the cheek to say it must be nice when someone else does all the hard work for you !
Run down the wall of a smallish office, total of 24 points, Rehau trunking which is nice as the lower section is part of the main structure and forms a trough that cables will sit in - as compared with most makes where you have to persuade cables to hang uphill while you get the lower cover on ? But the guy had taken the big space for a couple of RFCs and a bonding conductor, leaving me only the small top section to fit in the 24 network cables and a multi-pair phone cable. Had to give up and route the phone cable elsewhere. The guy was adamant that a) there was no separator available to make the lower section into a third compartment (I looked it up later, there was), and b) that only the larger middle section could be used for power because otherwise the insulation wouldn't work ? Seriously there are sparkies out there who believe that an insulating barrier in such trunking is directional.
The only time I've seen an issue using the middle section for other than power is that some trunking has open-backed mounting frames for sockets - so the back of power sockets would be open to whatever cables run behind. But even those (from memory) had the option of closed boxes.
The other bugbear was where the sparkies ran the cables, and as illustrated, DGAS about keeping them organised, labelling them, or even making them long enough. I had one job where there was a cable that was just 6 inch sticking out of the wall and I had to extend about 10% of them to reach the rack. It's the "I'll be gone and been paid before the next guy comes along" attitude.
I have it on good authority from both Legrand and Hager that their MCB's can be used in both directions.
That was my thought as well - it's AC, the current goes both ways by definition. It's hard to imagine how you could built a device like this that didn't work either way round.
mg_smile:
