If you measure from side to side without taking it out of the circuit and you use the color code and multiplier system you can see if its the reading it should be. If a red red orange is reading 21700 ohms on the meter then you know that ones ok, if it reads 210 then you know to lift it and take...
amp hours are used for volume of a battery. ex: 9v Duracell = 500ma/hr. which only means the battery will produce 500ma for one hour. or 100ma for 5 hrs. you had dollar signs so I can only take that as what would the cost be in dc battery output compared to alternating commercial supplied...
He wants the pre calculated formula for plan review it sounds like:
Very simple srkn: 2k x length x I current / cm circular mil or its equal in sq in/mm = vd
opti couplers and mosfets are the way to go but it sounds like he wants a form "A" single pole single throw dry set of contacts, transistors of any kind wouldn't work for him
Sounds like a marketing idea... So you know, they already make a W117 PCB (1000 ohm coil) relay/relays. Not sure if its w171 or w117 but theyre small and work. Is that about what you have?