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Ungrounded systems have existed for 100 years and still do in the USA and Europe. The National Electrical Code in the USA still allows many systems to remain ungrounded including older systems insta …

No. "Romex" is a trade name and is actually a brand of non-metallic cable or NM cable. Article 334 of the National Electrical Code. If your house was wired with NM cable in the 50's or before, it mos …

The equipment grounding conduc- tor shall be used for grounding or bonding of equipment, structures, or frames required to be grounded or bonded. … Any installed grounded conductor shall not be connected to the equipment grounding conduc- tor or to the grounding electrode(s). …

The equipment grounding conductor of a grounding-type receptacle or a branch-circuit extension shall be permitted to be connected to any of the following: (1) Any accessible point on the grounding electrode … system as described in 250.50 (2) Any accessible point on the grounding electrode conductor (3) The equipment grounding terminal bar within the enclosure where the branch circuit for the receptacle …

First off you should tell us where you are on the planet in order to get accurate answers. 1)There are 8 grounding points in the drawing. Which of them should be bond together? … There is no exact answer here. 3) Where should I connect the Neutral Line to the Grounding Rod? As close to the main service panel as possible. Good luck! …

Yes. As long as the switch is rated for the amperage of the load served and the voltage of the circuit. Your instance is an example of this (as long as the switches are rated for the voltage). Here is …

You should run another equipment grounding conductor from the panel to the box. … Then splice the equipment ground and bond it to the box with a #10/32 green grounding screw in the tapped hole in the box. Good luck! …

less than 1.83 m (6 ft) from any other electrode of another grounding system. … Two or more grounding electrodes that are bonded together shall be considered a single grounding electrode system. …

From the 2011 National Electrical Code 406.4(D)(2)(b) A non–grounding-type receptacle(s) shall be permitted to be replaced with a ground-fault circuit interrupter-type of receptacle(s). … An equipment grounding conductor shall not be connected from the ground-fault circuit-interrupter-type receptacle to any outlet supplied from the ground-fault circuit-interrupter receptacle. …

Electric vehicle supply equipment intended for connection to nonlocking, 2-pole, 3-wire grounding-type receptacle outlets rated at 125 V, single phase, 15 and 20 amperes or from a supply of less than 50 … Grounding for a circuit in a garage is especially important. …

Up until 2011 the National Electrical Code allowed a "3 wire" method of connecting a sub-panel. This means you have the two "hot" wires and a neutral running to the sub-panel as opposed to the "4 wire …

The industry practice is to ground the main panel end and leave the field end ungrounded. If you ground both ends you create an antenna for RF interference. Search the web for dipole antenna design. …

A lightning protection system is a building wide system. You don't just protect things individually. The ridgeline of your house would get air terminals and then if the antenna and chimney are withi …

Well, don't trust the no-contact tester to tell you anything but the presence of voltage somewhere close to the end of it. Beyond that they aren't much use. From what you said in #4 you have an open …

In the Main service panel it is personal preference as that is the location where the neutral and ground are bonded anyway. At a sub-panel separation of the neutral and ground is required by the Nati …