When does a subpanel need a ground rod

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= 160 square rods = 1/640 square mile (that is, 0.001 562 5 sq. mile) A square plot of ground 208.7 feet on a side will cover an acre. An American football field, 360 feet by 160 feet, is about 1.3 acres; 12 high school basketball courts are a little more than 1 acre.

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Dec 15, 2016 · Hi -I have a sub panel in my home which is fed from a main breaker located outside. I'm looking to add another sub panel right next to the other one. Do I need to run a ground to a rod from this panel as well? Wasn't 100% sure they are both in the same structure. If not, what all is required for grounding? Ground faults may be caused by many things, including dirt buildup on power line insulators (creating a dirty-water path for current from the conductor to the pole, and to the ground, when it rains), ground water infiltration in buried power line conductors, and birds landing on power lines, bridging the line to the pole with their wings.

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The Code requires you to space rods at least 6 feet apart [250.53 (B)]. However, this spacing is a minimum — and far from ideal. When using the typical 8-foot or 10-foot ground rod, you get the best results by spacing the rods at least 16 or 20 feet apart, respectively. This is much greater than the Code minimum 6-foot spacing. Apr 07, 2004 · but it is grounded to the service/power ground. I suppose I need to get with the cable company and find out how they plan on solving the ground/cable issue. I personally don't want to drive the ground rod in and have to run the ground cable to the other side of the house. On Thu, 08 Apr 2004 12:27:46 -0400, w_tom <[email protected]> wrote:

See why Blinds.com is the #1 online retailer of custom window coverings. With over 20 years online and 25 million windows covered, Blinds.com is the top choice for custom blinds, shades and shutters. May 01, 2016 · At some point in the late 80s or early 90s, the Massachusets code changes to require the house ground bond to go to the hot & cold water pipes at the water heater & then to a ground rod. One continuous wire bonding it all. As for what a utility does, that is anyone's guess, as they are not bound to any codes, except for height per voltages. Ed The ground rod would be for lightning...you still need the equipment ground from the main panel to the second building.