It should be noted that a pass of the EMC standards required for CE marking is a very easy standard to pass, and does not require anything like enough protection to guarantee co-location of equipment. The prescribed levels are set so that you are unlikely to receive or cause trouble from or to the neighbours next door, rather than to prevent self interfernce between bits of kit on the same property, where supposedly you are able to do something about it yourself. For single phase inverters used in motor speed control, the characteristics of the equipment will determine if Type A, F or B is required, to meet Regulation 531.3.3 For 3 phase inverters which do not incorporate isolating transformers, Type B RCDs must be used to meet the requirements of Regulation 531.3.3 For additional information.

Memshield 2 – These are also a commercial breaker and come in types B,C & D. These also will fit into all Memera 2000 range boards. Memera 2000 – There are several different styles of MCB's in this range but all will fit any Memera 2000 board.

My topics

Should be neutral - but I accept the motivations of the reader may focus on what is more important to them. but mounted above the old Wylex fuse boxes, however done before the rules changed as to electrical equipment in the control of an ordinary person. But still today we have isolators before the CU to comply with HSE rules an live working, so not sure if we can still mount SPD or RCD in separate box before or after main CU? The method of installation relating to protective earthing will depend on the operational leakage current (protective conductor current) – see 543.7. The use of a 30mA RCD may be required for several reasons; cable installation, location / application area for the pump etc. Take note of 531.3.2 Operational leakage current (protective conductor current) for the circuit should not exceed 30% of the RCD sensitivity.

The method of installation requires 30mA RCD protection – e.g. Regulation 415.1 & 522.6.202. Dedicated circuit feeding an immersion heater, conventional oven or cooker, with resistance heating elements. For existing installations, problems associated with the following may indicate that Type F is required in place of Type A:It is more a physical size & shape of fitting onto the Din rail inside the fusebox & if the main live bus-bar has a blade or a fork type fixing to the RCD and each MCB. If it is the main switch.. this would involve removing and reconnecting the main incomming supply tails.. So question one does it pass when tested with a RCD tester? If so what makes you think it is faulty? I am sure the one in my old house was tripping due to surges when a neighbour was welding. Two identical RCD's would hold for 18 months without a problem, then trip for seeming no reason for couple of weeks, then again two years no tripping. I believe the article makes it clear that the their are 4 Types of RCD that may need to be considered - Quote from the article -

A well-timed subject. Just a few weeks ago I tried to find a new RCD to replace an old BS4293 one. I have seen how a pure type-AC RCDs rated for 30 mA trip can allow multiple amps of half-wave-rectified current without tripping. As this is a TT installation where earth fault protection depends on the RCD, it feels very inappropriate to have anything less than a type-A, given that plenty of loads contain rectifiers. (Admittedly, the old one was presumably only like type-AC, but that's not an excuse.) The DC link values of capacitance and voltage, do not result in smooth dc values < 6 mA, being imposed on the AC pulsed wave form. The revised RCD guidance in 531.3.3 is precise. The appropriate Type of RCD must be selected, based on the characteristics of the residual current and the equipment that is likely to be connected to the RCD protected circuit".This information should be held on record, with other design criteria and the Installation Test Certificate for the premises. This will be required in the event of claims for negligence (Public liability insurance). i.e. WWFC 1877 Mr Wolves Football supporter I guess - This article raises several questions commonly posed by Installers (see the question marks). Designing to pass an immunity test at 200V/m from 10kHz to 6GHz (the Def Stan) is far more demanding that one at 3V/m (CE marking for type B, domestic situations) or even 10 V/m (CE marking industrial), there is a reason that all the geen boxes are milled from solid metal and have EMC gaskets everywhere.

The MR 30 is one of their most popular products. The Memshield 2 MR30 RCBO Pod is a residual current operated circuit breaker that can be added to any standard 1 pole or 1 pole + N Eaton MCB. It is a Miniature Circuit Breaker with the function of a Residual Current Circuit Breaker and is fully compliant with IEC 61009. Memera 2000AD – These have a narrow terminal and only fit boards specifically marked Memera 2000AD. They won't fit in older boards. Would you be able to reveal the make and model of the RCD that trips, and the make and model of the smart meter? Otherwise, I'm not quibbling the need for proper spur to garage, which will separate off two freezers from kitchen, but how do you people feel about this diagnosis? My own insulation tests with mega meter to each unplugged appliance have found no resistance issues, which given he found no wiring issues, leaves no obvious cause except as he thinks maybe too much total freezer earth leakage. Intermittent faults like tripping can send you mad as we all know, is this a good course of action?This handy RC Unit (residual current unit) has been designed for installing on to any standard 1P or 1P+N Eaton MCB with a 10kA, 15kA & 6kA rating to create an RCBO. The MR30 RC POD unit is ideal for standard applications with a 230-240 VAC voltage rating and 30 mA breaking capacity and is field fitable. Fully compliant with Standard 61009, this capable MR30 POD is utilised in numerous industrial and commercial applications due to its versatility and ease of assembly.