Type A rcd . EICR coding ? etc

I don't think that is quite right Graham because a number of older models use a single thyristor, and provide the motor with half-wave rectified DC.  This is fine for a universal motor, provides speed control, etc, but could give "DC" faults.


I wonder how many readers have realised that there is an elephant in the forum, that is so far completely unseen, yet gives us much to talk about. It is the bland phrase "Manufacturer's instructions", which I have often criticised. The piece which is missing is a section in BS7671 that specifies exactly that which they may or may not contain and constrains them from modifying installations to suit products. One notices that this is now rife, and apparently without any form of control. How long before a manufacturer decides that his plug in product requires a gizmo in the supply to make it safe, perhaps which he also manufactures, but makes the product supposedly "safer". This has already happened with electric cars. Here we are discussing products, which due to poor design and possible faults, can make the wiring system less safe because they defeat certain additional protection measures! Why should the consumer (particularly rental landlords) have to pay to make them safe again? This is a complete failure of the regulation system and must be resisted and in fact, regulated away. I can see where this is going to end up if we are not careful, and that is that only one appliance must be connected to each final circuit, which must have an AFDD/MCB/RCD combination CPD. 50 final circuits per house, no double sockets, and a price that cannot be afforded by most people.


Utopia! But just who gains? It will rot reduce electric shocks to zero, fires to zero, or anything else which some may consider necessary or even desirable.

I don't think that is quite right Graham because a number of older models use a single thyristor, and provide the motor with half-wave rectified DC.  This is fine for a universal motor, provides speed control, etc, but could give "DC" faults.


I wonder how many readers have realised that there is an elephant in the forum, that is so far completely unseen, yet gives us much to talk about. It is the bland phrase "Manufacturer's instructions", which I have often criticised. The piece which is missing is a section in BS7671 that specifies exactly that which they may or may not contain and constrains them from modifying installations to suit products. One notices that this is now rife, and apparently without any form of control. How long before a manufacturer decides that his plug in product requires a gizmo in the supply to make it safe, perhaps which he also manufactures, but makes the product supposedly "safer". This has already happened with electric cars. Here we are discussing products, which due to poor design and possible faults, can make the wiring system less safe because they defeat certain additional protection measures! Why should the consumer (particularly rental landlords) have to pay to make them safe again? This is a complete failure of the regulation system and must be resisted and in fact, regulated away. I can see where this is going to end up if we are not careful, and that is that only one appliance must be connected to each final circuit, which must have an AFDD/MCB/RCD combination CPD. 50 final circuits per house, no double sockets, and a price that cannot be afforded by most people.


Utopia! But just who gains? It will rot reduce electric shocks to zero, fires to zero, or anything else which some may consider necessary or even desirable.