Agreed. They seem to be pretty lazy when it comes to the classes you are put in to. Anywhere from a 75a to 175a fuse keeps me in the same class...Quote:
Originally Posted by keep_hope_alive
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Agreed. They seem to be pretty lazy when it comes to the classes you are put in to. Anywhere from a 75a to 175a fuse keeps me in the same class...Quote:
Originally Posted by keep_hope_alive
Nice tool avatar to start but finally you get it. Im looking at power draw in a purely electrical view, not looking at what the electronics are doing. Plus most fuses have a built in surge factor. In a short period you can hit that current and be ok for a litttle while if you buy Quality fuses they hold up better than the chinese ANLs or what it is you have to run. I am not competeing so I use industrial fuses and switches that are used in the cranes at my shipyard i worked at.Quote:
Originally Posted by keep_hope_alive
yep. as an EE i have to choose fuses based on their time/current curve characteristics.Quote:
Originally Posted by tommydh
I do know what you mean but you know that thereare better stuff than what most use but when limited to competition rules you have to use that. When my stock battery finaly goes I am upgrading all my wire to xo jacketed "welding" cable although this is more fore locomotive and crane apps.Quote:
Originally Posted by keep_hope_alive
I am a liscenesed Master Electrician and also have to choosse best fuse/overcurrant protection drvice per need plus I teach 1st year apprenticesQuote:
Originally Posted by keep_hope_alive
That's great! Do you get into arc flash and selective coordination calculations and software also? We use SKM Power Tools.Quote:
Originally Posted by tommydh
I agree there are much better quality products available than what the car audio market has available. Much better wire, better fuses, better connectors, etc.
Keep in mind that regardless of the type of wire used, the connection method in a car is limited to the 60 deg. C column in the NEC Ampacity tables. If someone decided to use compression lugs on both ends of the wire, I think the 75 deg C. column could be used.
I have taken arc flash classes as part of my highvoltage splicing and termination training. Along with the ampacity tidbit all of those USING sheet metal screws for grounds are just asking for failure. According to NEC 250 you must have at least 5 threads engaged to be considered a ground as well as the article that states Sheet metall Screws may NOT be used as grounding means. Also on the ampacity why is it that car audio cable manufactures do not have to follow the same standards.Quote:
Originally Posted by keep_hope_alive
Quote:
Originally Posted by tommydh
it is annoying that car audio manufacturers have seemingly no standard for AWG.
Very and its even worse when you ask for their specs and insulation ratingQuote:
Originally Posted by keep_hope_alive