Dave-Shrop

Yes, the width trench created by overflowing water is only about 30 feet, the embankment either side is still there, nothing like Dutton, although part of towpath has been washed away, once that trench is blocked and the canal filled in it could hold the water. The pressure on the sides is very small particularly as the canal is so shallow at the edges, the main force/pressure is down through the bed of the canal. if necessary a dam could be put around it. It only washed away that section because it overflowed at it was lower there due to access for staff to inspect the aqueduct. I do wonder whether the overflow channel/culvert further along was last inspected.

Yes, could have had the opening through towpath blocked and hole in canal bed filled in, and canal back in use with restricted width by breach, now 9 days since breach and mothering started or organised.

What is the delay getting it repaired, are they waiting for volunteers. I will bring my JCB and hammer in steel pilling then some puddles clay into hole and behind pilling and we can have it open by the end of next week.

Why don't they pump it into tanks/reservoir and back again

They have put the Dam just beyond, the only nice field next to the A530 where they could had very good access to the breach for getting equipment and materials there.

Gas Street Birmingham

Why can they not use the canal Bed for access and site works, crane tracked plant from main Road onto canal Bed and drive to site. There is matting available which is used in fields to move plant if necessary. The fields on both sides are much lower than the canal and I can not see how they could work from there, also the river is in the way. I could not understand why they paid the farmer for use of his field for two years at Dutton. There is a large tree washed down with big roots which was up the top, roots trying to get water disturbed the embankment. Mooring pins Banned, unless you want to be prosecuted by the racing cyclist

Someone moored at the Old Lea Wharf North Moorings this morning tipped they HOT ASH under the hedge and then left, half an hour later the hedge was on fire !!!

Very Strange the telephone number 01785 is Stafford in the midlands.

They feed to and from the side pounds, that is why you open them first and then the adjacent gate paddle of the lock below.

Yes

I contacted Beta Marine and they supplied that information, if you contact them they will confirm it.

No I think it only applies to Beta Marine, only Beta Marine have confirmed this, it is a new arrangement, don't know about other engine manufactures, had no replies from them. The TP supplied from garage type installers to be installed on an existing engine are the ones sold for putting on vehicles and are centre tapped earth. The question needs to be asked before agreeing have one.

Beta Marine state their Travel Power does not have the centre tap earthed and can be connected safely as per attached pdf to give UK standard neutral earth system. New TP bond phase to earth for marine applications.pdf

Talk to the Man at Leesan, very helpful, they have all the filters to fit in vents to stop any smell.

ISO 13297 7.1.1 In unpolarized systems, double-pole circuit-breakers that open both live and neutral conductors are required. 7.3.2 Both conductors of each branch circuit in unpolarized systems shall be provided with overcurrent protection by double-pole circuit-breakers and double-pole switches, if used, at the point of connection to the main panel-board bus. Does this not mean that MCB's should be double pole?

Does not your Travel Power/shore/inverter then feed an AC distribution board feeding individual AC circuits via MCB's, which requires Double pole MCB's for Travel Power and Single pole MCB's for Shore/inverter. Are not the Thousands of boats that have Travel Power and have an AC distribution board feeding individual AC circuits in the same position. I have seen many boats with travel Power and only single MCB's, including hire boats

Do not see how you can check with a multi-meter, because there will be lots of electronics connected to the secondary output circuit of the transformer for measuring voltage, current, and frequency and also means to control the voltage which is usually by switching connections to winding taps.

As stated on here by some they are using non double pole switched sockets and using circuit breakers in only one pole when on 240 volt centre tapped earth system.

Why do people purchase 240 volt Centre tapped earthed system, when they are using UK 240 volt Neutral earthed designed equipment, is it because they are cheaper. By time you comply with the requirements for 240 volt Centre tapped earthed system I cannot see it is cheaper. Victron make Inverters suitable for the 240 volt Neutral earthed UK system. The 240 volt Centre tapped earthed system is made for the Domestic market of North America and Canada.

That is because most electronic devices use " Switch Mode Power Supply (SMP) " instead of a transformer, and one of the DC output poles is earthed, if connected to a 240 volt centre tapped earthed you will have all funny voltages appearing. Also some of these SMP's have small capacitors connected earth to reduce the Electromagnetic interference (EMI), which is caused by the high frequency switching of SMP. Equipment Designed and CEI approved for connection to 240 volt negative earthed system should not be connected to a 240 volt Centre tapped earthed system.

I think it is very relevant an Electronic RCD cannot be Guaranteed to Trip (ask the manufacture) IEE regs require Double pole overload Circuit breakers, this means not using a Neutral bar. Anyway I will not continue, if you are advising the poster it is safe, then it is down to you when someone gets killed. I would advise not use it like that, if the inverter has an isolated secondary (from primary) then it is quite easy to have a neutral/earth. (as Sterling do) David IEng MIETE

Firstly the use of RCDs on reduced voltage such as 110 volts for a 240 volt RCD. In the case of electronic RCDs they can only be used at their stated voltage because of the requirements of the electronic circuit. As far as protection in the event of an earth fault is concerned on electromagnetic RCCBs there is no problem since the operation is dependant on residual current only. However the test circuit has to generate sufficient current to trip the RCCB and this is dependant on voltage. Generally a 240 volt RCD will operate on the test button down to 110 volts. However according to BS4293 the test button is required to operate at 85% plus and minus 5% of the rated voltage. That is 192 volts for a 240 volt supply and 88 volts for a 110 volt supply. This latter operation cannot be guaranteed so although a 240 volt RCD will operate at 110 volts you cannot claim compliance with IEC1008 at that voltage. To test you need a RCD tester suitable for 110 volts. You also require Double pole circuit breakers on a earth centre tapped supply to comply with the IEE regs.

From Sterling Inverter Site

All inverters should be used in conjunction with a RCD for ultimate safety and to comply with IEE electrical installation codes. If you do not fit a RCD (as you are suppose to) a centre tapped inverter would be your safest option, but it will not operate a RCD safely it is, therefore, vital that if you want to use a RCD in line with the AC output then the inverter unit must be converted from Centre tapped earth to Neutral earth bonded, failure to do so will render the RCD ineffective. The US system referred to is 55 volts to earth, 110 between phases, a shock from 55 volts will reduce current supplied. Most inverters can be converted.