I Need to design a Energy meter ( Single phase 240 Vac, 0.4 mA ) , its a industrial product with enclosure of IP 67. I need to design PCB for this product as per UL. I am new to UL procedure so please guide me.
Note 1) First Schematics and select all component, those are only UL Certified ?? what if some component are not UL listed, like resistor , capacitor , transistor,IC etc. will this PCB fail to get UL certificate.
Note 2) In Layout follow the Clearance and creepage distance.
Note 3) Find the PCB vendor who make UL rated PCB,Send the PCB for manufacturing Will PCB vendor will mark UL logo now on PCB or first PCB need to send UL lab to test and validate then in second interation we can ask PCB vendor to mark UL logo on it?
Note 4) If we need to send PCB for UL lab for certifiaction, Do we need to send bare board or assemble board or Full working unit.
Note 5) What Test lab people will run , Do I have to tell them what test need to run or do they run as per their process.
Note 6) What Standard need to follow to get UL rated PCB.
Note 7) How much designer involvement in getting UL rated PCB, should has to guide the PCB vendor for what material need to use or process.