The best-known diagramming program is Microsoft Visio which comes with lots of symbol in templates. If you don't want to pay for Visio then take a look at an open-source program called Dia. It is available in Linux and Windows.
symbol shown as 'Slow Operating Relay - Delay On' is actually a Coaxial Socket.
The 'Slow Operating Relay - Delay On' re-appears on
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as it's not really my field [1], I can't say if that one is really right or wrong ...
The Rectifier and Inverter symbols on this page:
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use THIS symbol '~' to denote AC (as used in some of the other symbols).
[1] My field is electronics, rather than electrical. No doubt, if there are other errors, somebody with better knowledge in the electrical field will tell you ...
my plan is more of a thumbnail sketch/aide memoire for his costing
I plan to do all the chase ork myself, after I've consulted the electrician
- I'll prolly have to give him a 'consultation fee' as he accompanies me round the rooms with an aerosol that will be used to mark out sockets, cable runs etc.
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