dmr

A few weeks ago we pumped al the s**t out of the holding tank and are now replacing it with new and very different s**t, do we need a survey and paperwork ? 😀

Will investigate further tomoro, especially the observation from moominpapa, maybe I got it wrong, but ultimately I observe things rather than following ISO regulations, because some boat stuff goes against normal domestic practice, but still uses domestic equipment there is always a potential for things to wrong. Have just looked at my old MCB's (Doepke) and the terminals do screw upwards to clamp but the thread is such that its still righty tighty. All interesting stuff.

Data sheet says 25mm2 in and 10mm2 out. The10mm out could be two wires of 2.5 plus some to spare. Not sure why the in is 25mm, but suspect there is a good reason. Could be to join a whole load together. Do most modern consumer units have a live busbar???

I mostly like ferrules but prefer them on thicker cables, about 2.5mm minimum. They are ok on 1.5 but if used with a choc bloc they can snap off if you have to undo/redo them a few times. They are in effect turning a soft copper wire into a more brittle structure, though I suspect some are better than others.

Pretty sure I got it right, I had a good look inside the terminals, but I will have another look tomorow. They are big holes. I did download the spec and they can take some pretty hefty cables, but I think the spec said 1.5 minimum and I am doing 2.5. Not sure why domestic stuff takes such big wires, unless they are intended to take several wires into each connector.

I tried a ferrule of the correct size, crimped onto the wire. My crimp was fine (I have worked with electricity all of my life 😀). The terminal just couldn't get a decent grip onto the ferrule, though ferules worked fine on the earth commoning strip. My guess is that these terminals need to work with a softer metal like copper to get a good grip. I was very tempted to solder the strands but decided against it as everybody hates soldering these days. Yes, looks like MK was a bad decision, maybe I should have gone for proper Chinese like Chint??? I wanted double pole (or at least "+N") and wanted in at the bottom and out at the top so the MK looked just right.

Its an old consumer unit (in a tight space) and does not have commoning strips for the live and neutral. I have used large chocolate blocks to common up the 4 wires (one in, three out) for now as I judged this to be much safer than having multiple wires into a single terminal. I will get some of the lever ones from your link.

Yes, they are square "tunnels" with a flat bottom and flat clamp. One of the clamps (neutral?) has fine ridges on it, the other is smooth, which is a bit odd. The clamp does grip the wire but not with nearly as much force as I would like. The old ones that I took out had a more rounded tunnel and this worked much better.

I have just redone my consumer unit with RCBO's (mcb and rcd combined). These were from a "reputable" company, MK, though looked to be very chinese. I have had great difficulty getting the contacts to get a good grip on the cables, even when tight I can still pull them out with moderate force. Maybe this is normal but I don't like it. The www tells me I am not alone here. I wonder if these contacts are intended for solid copper, or thick strands of copper, as used for conventional mains wiring, and if our boaty use of fine stranded cable is actually counter productive here and creating a potential hazzard ???😀. The best method is to spread the freshly cut strands out into a fan, twisting is no good at all, bootlace ferules are worse than useless, and its strictly one cable per connector which is not really viable in my consumer unit.

Is it possible to drill a hole in the side of the boat and fit a new outlet? We have a shower sharing an outlet and it has been trouble trouble trouble.

I get a bit cross when volunteers tell me to get back on the boat. I wonder how many of them know how to respond in an emergency????? Actually, though based on a relatively small sample, I can answer that question 😀 Its about 50%.

Where these maybe an advanced crew from an approaching boat, possibly still a lock or two away?

and financial support to help maintain your boat ??? 😀 yes please, i'm finding the maintenance hard work as I get older, can CRT pay somebody to come and do the rust removal and painting for me please? and afterwards can they cook my dinner and take me to the pub please??

Is that efficiency graph for the motor itself, or motor + prop? Why does it reduce at low speeds???

My understanding is that a paddle rod was broken and while fixing it somebody looked up at the chains and said "oooh, weve not replaced those for years". I don't know why this wasn't picked up in the annual safety inspection, but there is no safety mechanism, if those chains fail its big trouble for a boat going through. This does cross my mind everytime we use that lock. Still, at least CRT are doing some routine maintenance on the Rochdale which is good, and as its closed at the Sowerby end maybe this is not a bad time to be doing it.