Newporttom wrote:Just traded in 2012 for 2018. I have an existing 240 volt line that I used with my 2012 with a modified EVSE. It's either a 20 amp or 30 amp line. Can I use that line (once an electrician modifies the plug), or do I need a 50 amp line?
That may be your reason, but the NEC doesn't require it. As the EVSE included with the Nissan Leaf requires only a 40A circuit, it is acceptable to install a 40A circuit with a 14-50 receptacle.EVDRIVER wrote:if it has a 50A plug it needs a 50A circuit. The reason is that someone could come along and plug a device in that outlet that would draw 40A.
wwhitney wrote:That may be your reason, but the NEC doesn't require it. As the EVSE included with the Nissan Leaf requires only a 40A circuit, it is acceptable to install a 40A circuit with a 14-50 receptacle.EVDRIVER wrote:if it has a 50A plug it needs a 50A circuit. The reason is that someone could come along and plug a device in that outlet that would draw 40A.
My point is not if they care changing the code but enforcing a higher requirement. I'm not sure they need to change the code to require a 50A breaker or disconnect. Even if they do many inspectors make the call and you can debate it all you want but that's batter better fought on bigger issues. Why argue an create other issues when changing wire or adding something is usually easy. Most electricians in the SF proper area will only put in 50A circuits regardless, I asked two the other day and both said they will not install a 40A breaker even a the customers request. If the panel supports it and there are not other ramifications it is really foolish not to have the headroom regardless. As an odd example I think there is one city that will not allow any Romex anywhere only flex, talk about old politics. I tired to get a second meter and SF declined me because they were banning them for single family homes thinking it would be used for in in-law unit. Stupid rules all over.wwhitney wrote:That's all fine, but a few points:
1) Our experience in California isn't very useful to the OP in Florida. Many jurisdictions adopt the National Electrical Code as is, but of course it is important to check for local amendments.
2) In California, jurisdictions can only amend the California building codes for "local climatic, geological, or topographical conditions," and those amendments have to be filed with the state. A list of jurisdictions that have done this is available here as a PDF: http://www.bsc.ca.gov/Rulemaking/LocalC ... ances.aspx Are you aware of any jurisdiction that has amended the California Electrical Code to prohibit a 14-50 receptacle on a 40 amp circuit?
3) Misinformed inspectors making up requirements is always a problem.