Conductors should be of an appropriate size for the application, and should pass through openings with no sharp edges with sufficient clearance to prevent fraying or damage. If they are accessible to the user of the product, they must be tested to withstand a certain amount of “strain” (for more on strain relief, see below). Finally you can never cross low voltage and high voltage conductors unless the low voltage wiring is rated for the higher voltage. For example, a wire carrying 12 volts may be in contact with a wire carrying 120 volts so long as it is rated for 120 volts itself.

 

This process has led production people to do small runs of 50 or 100 units, then they call us so they can avoid the whole system of full certification and follow-up service. We come to the site, inspect the units, label them, and then we go away. If you have another small run we can come back and do it again. We’ve already done the testing , so this time all we have to do is verify that the units you want labeled are the same. Once we do we put a sticker on them. That makes this follow-up less costly. Once we’ve labeled the units, we’re gone. In cases like these we are red-tag erasers. If you get red-tagged we can free the piece of machinery so you can get back into production. 

We work with all of the NRTLs—UL, Intertech, CSA, TUV, QPS and MET. Our job is to help you achieve certification for all of your products. We can tell you exactly what you need to make those products pass. We begin by converting your documentation into the correct forms and formats. Our other services include: design review from concept, complete paragraph-by-paragraph evaluation, preliminary testing, and submittal management. Our relationships with all of the NRTLs are phenomenally good, and we have learned the secrets of how to get compliance done.