D
Darkwood
The BS60204 cover machinery control which is where some of this would sit regarding the magnet and the exciter circuit although it does say supply circuits to lifting magnet, it is a poorly worded question given omission of the overload can be done for other reasons too and anyone delving in these particular examples shouldn't be doing so without been converse in other British Standards so I find it a strange question to ask, the latter 2 rely on a person recognising how a control system operates and the safety features within it before establishing a risk assessment for an omission ... well beyond BS7671 IMHO, it borders on giving pupils a false sense of security if they indeed do come across said circuits with lack of O/L protection as they may consider it OK when in fact it is incorrect or missing given the particular design. I think the latter examples of a magnet and exciter circuit should remain in the relevant regulations and not cross over into the BS7671.
