It is an abbrevation for Common Era and is an alternative to the  naming of the calendar era of AD. BCE (Before Common Era) and CE  are the numerical equivalents of the ca â¦ lendar eras of BC (Before  Christ) and AD ('Anno Domini'). 632 CE means the same as 632 AD.
A Rod A rod is a unit of distance equal to 5.5 yards or 16.5 feet.
A ground rod may have a diameter of 0.625 inch as examined during the review process with a micrometer; but how does an inspector know, without a visual examination of the listed mark, that the rod was produced to a code-compliant length of 8 feet and that it has the proper amount of protective coating?