![1/4 IPS Sockets](http://sundialwire.com/cdn/shop/collections/SKP1-4IPSGNDK_main_380x380.jpg?v=1568078512)
1/4 IPS Sockets
Most sockets have a standard-sized opening in their cap. That standard size is called 1/8 IPS and accommodates wires to just under 3/8" in diameter. (IPS stands for internal pipe size.) The 1/4 IPS sockets have a larger opening, accommodating wire up to 1/2" in diameter.