Member postings for Rick Kirkland 1

Edited By Rick Kirkland 1 on 09/01/2017 10:48:46

Edited By Rick Kirkland 1 on 08/01/2017 09:51:16

That brings back many happy memories. My dad had the exact same lathe. His was from the middle to late 1930's and had not had the headstock flat pulleys re configured for Vee belt drive. It was on flat belts driven from an overhead countershaft which we used to flick up and down the pulley steps, by hand, in order to change speed. Those were the days. Unfortunately I didn't inherit the machine as not long before he died my dad sold it to a guy who put the bits in the corner of his farmyard and not long after weighed it in for scrap. That's life. So sad.

Edited By Rick Kirkland 1 on 11/12/2016 15:47:15

Edited By Rick Kirkland 1 on 11/12/2016 15:48:20

There's no such thing as a type B RCD. B designates a time/current curve applicable to MCB's. One of your options is to have a professional electrician install a designated circuit for your inverters. He may then use a time delayed RCD of 30mA tripping current, or, depending on how he installs and designs the circuit, he may use an RCD with a greater than 30mA trip current, or in some cases if the circuit is for items of permanently connected equipment and the circuit is for the sole use of a person skilled in the safe use of such, an RCD may, as long as overcurrent protection and effective means of earthing is in place, omit the RCD altogether,.. However, the design and installation methods for the cables are paramount. An electrician who is competent to the 17th edition regs as amended 2015, and not one who pretends he or she is will be able to advise.

Capnahab. The switch in your picture is an RCBO which is a residual current device with overload protection. Basically it looks like the earth leakage value is excessive when you use more than one inverter at once. As it's a C class time/current curve breaker I would venture to say that if it was overcurrent causing the trip, then it would trip with a bit of a bang. If it just clicks off without a bang then it most probably is earth current leakage. This RCBO is rated at 30 milliamp trip current but in practice most trip before that magnitude of current is attained, in fact some are out at 15 or 16 milliamps which is the reason for nuisance tripping. Most however are out between 19 and 27 milliamps earth leakage and inverters are notorious for earth leakage currents which by their nature and magnitude are not detrimental but are sufficient to trip the safety device.

Rick

Is that a photo of Archbishop Harold Hall?

RICK