 2020 NEC | Joined: Dec 2007 Posts: 6,534 Likes: 1 Admin | OP  Admin Joined: Dec 2007 Posts: 6,534 Likes: 1 | Another 8 hours of code change class consisting of watching/listening to someone reading Powerpoint slides. ![[Linked Image]](https://sundance-communications.com/forum/gallery/58/full/4705.png) | | |  Re: 2020 NEC | Joined: Feb 2005 Posts: 12,262 Member |  Member Joined: Feb 2005 Posts: 12,262 | Art 230.67 requires an SPD at the service entrance to protect the (also required) AFCI breakers in the panel which have internal electronics. So don't get warm and fuzzy, they didn't do it for you. I'm also sure "influence" from the manufacturers might have helped getting them written into code, not unlike what happened with those useless AFCI breakers.  -Hal
Last edited by hbiss; 07/29/20 02:22 AM.
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