Full Answer
What size wire do I need for a bonding pipe?
Only # 6 is required # 4 is required for concrete encased electrodes but everything else in a residential install # 6 would meet code ( it is ok to use #4 if the clamp is listed for that size). I am talking about copper wire here. Show activity on this post. This is what I usually see used in the field for bonding pipes of any kind.
What are the requirements for grounding and bonding in the NEC?
Grounding and Bonding Requirements in the NEC. 1 Any system that can be grounded so that the maximum voltage-to-ground doesn’t exceed 150V. 2 A 3-phase, 4-wire Wye system that uses the neutral as a circuit conductor, and. 3 A 3-phase, 4-wire Delta system that has a circuit conductor that connects to the midpoint of one of the phase windings.
What are the requirements for grounding a piping system?
(1) Equipment grounding conductor for the circuit that is likely to energize the piping system (5) One or more grounding electrodes used, if the grounding electrode conductor or bonding jumper to the grounding electrode is of sufficient size
What size ground wire do I need for a 200 amp?
The minimum size for a grounding wire for 200 amp is #4 AWG copper or #2 AWG aluminum, according to Article 250 of the 2020 NEC. The size of the primary conductor may need to increase for a variety of reasons, including the length of the run, available fault current, or any number of reasons.
What gauge should a ground wire be?
Even without AFCI breakers, the 16-gauge ground wire should be adequate in most instances to clear a short, a fault, or an overload.
What is the gauge of wire used for grounding and bonding?
What Is The Gauge Of Wire Used For Grounding And Bonding? Grounding of 18 gauge wires is highly recommended.Feb 11, 2022
What size is bonding wire?
Generally bonding wires can range from 12.5 – 500µm in diameter. The 12.5 – 75µm range is generally considered to be a fine wire application and the 100 – 500µm range is for large or heavy wire applications.Apr 28, 2020
What size ground wire do I need for ground rod?
The NEC code specifies that a solid copper wire used to connect to a ground rod must be at least either #6 or #8 gauge (depending on the size of your electrical service cable). #6 cable cable will always satisfy the sizing requirement, though in some cases larger is desirable.Jul 29, 2013
What is the minimum size internal bonding conductor?
The bonding conductor or grounding electrode conductor shall not be smaller than 14 AWG. It shall have a current-carrying capacity not less than that of the grounded metallic member(s).
What size ground is needed for a 200 amp service?
A grounding wire ranging from 2AWG to 8 AWG is recommended for a 200-amp service. You can use 8AWG (Copper) or 6 AWG (Aluminum) grounding wires for a 200-amp service. You can also use copper conductors of 4AWG and aluminum conductors of 2AWG.
What is the minimum size of the main bonding jumper?
The minimum size of the main bonding jumper would be 0.125 x 2,000 kcmil, or at least 250kcmil. Occasionally, an installation will involve the use of a material for the main bonding jumper that differs from the material of the phase conductors.
What is the minimum size conductor for bonding metallic enclosures?
The majority of fault current will be taken by the service grounded conductor of the system back to the source, and a grounding conductor sized not less than No. 6 AWG would be sufficient to carry any portion of the fault current that will flow through it.”
What is the minimum size aluminum main bonding jumper?
What is the minimum size aluminum main bonding jumper permitted if the ungrounded conductors are 500 kcmil aluminum? A: 1/0 AWG aluminum.
What's the minimum depth of a grounding rod?
8-footThe only legal ground rod must be installed a minimum of 8-foot in the ground.Jul 30, 2018
Should ground wire be solid or stranded?
Stranded is a better conductor for lightning protection regardless of the wire size. That is, AWG 10 stranded will be a better conductor than 10 AWG solid.Apr 8, 2008
What is the minimum size grounding electrode conductor?
For the example, the minimum size grounding-electrode conductor is 2 AWG copper or 1/0 aluminum where buried metal water pipe is the grounding electrode.
What is the gauge of wire?
The gauge of the wires that carries the power from the transformer to your home and within your home are chosen in size to ensure that they do not overheat at their rated amperage.
How is power supplied to a home?
Power is supplied to your home, from the utility, in the form of volts and amps. The amount of power that the utility provides is governed by the transformer on the pole, as shown in Figure 1, or the transformer that is mounted on the ground, as shown in Figure 2, that services your home and the size of the wires from that transformer to your home.
KJ4NTS
I have about a 50 foot run from my radio to the outside ground rod. What's the minimum gauge wire that is acceptable for this connection?
Michael Coslo
Is a nice station grounding pdf from Polyphasor. Sorry for the tinyurl, the original url is a mile long.
Bruce in alaska
The two are pretty much Mutually Exclusive. What makes for Good Lightning Protection, really doesn't have ANYTHING to do with RF Grounding, especially if your using an End Feed Vertical, for an Antenna. Lightning Protection is a Ground Rod that meets NEC. Low Impedance RF Grounding System design is a Science and Art all in itself.
Art Unwin
Atta boy Bruce! A ground plane or counterpoise is part and parcel of a antenna all of which does not necessarily radiate and it is not of the same potential of the true ground that should be at the lowest potential of them all. It is for this reason the transmitter chassis is grounded and separated from the radiator system which has it's own closed circuit and where the potential is above that of true ground.
Brad
On Aug 4, 3:52 am, "KJ4NTS" < [email protected] > wrote: .
Michael Coslo
Gathering from your other posts, you are in a difficult situation. RF grounding from a non ground floor or basement location is an issue. The problem is proportional to the frequency and wavelength, which is to say that at 10 meters, your RF ground won't.
Michael Coslo
KJ4NTS wrote: > On 5-Aug-2009, "JB" < [email protected] > wrote: > >> This is a balanced antenna and if the antenna is stretched out in an area >> where there is no metal it should do it's best.
Why do we ground systems and bond equipment together?
So, why do we ground systems and bond equipment together? Grounding is the act of connecting the electrical system or equipment to the earth or a conductive object that extends the connection to the earth. Bonding is connecting things together with a conductive path to establish electrical continuity. Both are foundational safety concepts in the NEC, and often talked about in the same breath, but they are distinctly different concepts.
Why is bonding used in electrical circuits?
In addition to serving as a fault current path, bonding is often used to keep an environment at the same potential. In certain environments, small changes in voltage can have dire consequences. When grounding or bonding, or performing any ...
What are the main components of a ground fault current path?
The main components of this effective ground-fault current path are made up of the equipment grounding conductors such as bonding jumpers (main, system, supply-side, equipment) and service or system grounded conductors . Equipment grounding conductors are the effective ground-fault current path at the feeder and branch circuit levels of the premise wiring system, and it must be sized in accordance with Table 250.122, which is based on OCPD size. Discontinuous portions of the equipment grounding conduction (EGC) are connected by equipment bonding jumpers that are sized from this same table. While the EGC system connects equipment to the earth to limit the voltage-to-ground at the equipment, it also serves a dual role and bonds noncurrent carrying metal parts of the system together to connect them to the effective ground-fault current path.
What section of the NEC requires all electrodes to be included in the system?
Either way, the NEC requires all electrodes present on the premises to be included in the system. The permitted electrodes can be found in section 250.52.
Why is it important to remember the NEC code?
When grounding or bonding, or performing any electrical work governed by the NEC, remember the purpose of the code: to keep everyone safe. Understanding why you’re applying codes and standards, will help you determine how you perform the work.
Why do electrical systems connect to ground?
As Section 250.4 (A) (1) explains, electrical systems connect to ground to limit voltage imposed from lightning strikes, line surges, high-voltage crossovers and to stabilize voltage-to-ground under normal operation. Then equipment is connected to the system to limit voltage-to-ground at the equipment. This is done through a conductor that extends the connection from the equipment to the grounding electrode conductor back at either the service or the source of a separately derived system. This ensures control of the voltage.
What is the purpose of NEC 90.1?
The purpose statement of the NEC, section 90.1 (A) states, “The purpose of this Code is the practical safeguarding of persons and property from hazards arising from the use of electricity. ”. In other words, it all comes back to protecting people and property from the inherent hazards of using electricity.
What is the minimum wire size for the Coast Guard?
Keep in mind that the search does not realize that the minimum wire gauge size the U.S. Coast Guard will allow is 16 AWG (American wire gauge), with some exception for the use of 18 AWG under certain standards-specified circumstances. This applies to both AC and DC circuitry.
How to determine AC wire size?
There are two ways to find the correct AC wire size: The first is to consult the American Boat & Yacht Council (ABYC) AC wire sizing charts found within ABYC Standard E-11. Boaters can access ABYC standard E-11 by going to the ABYC website. Navigate to the recreational boater area, and click on the "become a member" link. Sign up for the free trial membership, and use that five-day window to gain access to the E-11 standard. In E-11, you'll find a series of tables to help you properly size AC conductors using the criteria outlined here.
Why is AC wire sizing important?
Because AC circuit wire sizing is a bit simpler than DC, we'll start there. Again, with AC, our primary concern is heat buildup as cables get routed through your boat. Sizing of individual conductors is based on three things: (1) how much amperage the circuit is going to have running through it, (2) whether the cable is routed through a hot engine room space, and (3) the temperature rating for the cable insulation. An additional concern is when multiple cables are bundled together, which increases the potential for even more heat.
How many conductors does a triplex cable have?
So a single piece of triplex cable has two current carrying conductors: the hot wire and the neutral, or the black and white wires. In the case of 240-volt four-conductor cable, there are going to be three current-carrying wires per cable: two hot wires and a neutral. Again, the green grounding wire does not get counted.
What is AC cable rating?
Cables are rated for their insulation temperature rating – how much heat they can tolerate. This rating is particularly important for AC cable routed through engine room spaces. (Chart from ABYC Electrical Certification Study Guide) AC wiring is primarily what we call "triplex" and sometimes "four-conductor" cable.
What is AC wire?
AC wiring is primarily what we call "triplex" and sometimes "four-conductor" cable. The green grounding conductor is not counted when considering bundle size. You only need to count normal current-carrying conductors. So a single piece of triplex cable has two current carrying conductors: the hot wire and the neutral, or the black and white wires. In the case of 240-volt four-conductor cable, there are going to be three current-carrying wires per cable: two hot wires and a neutral. Again, the green grounding wire does not get counted. (Note: If you're dealing with a foreign-built boat, color coding and conductor count may be a bit different than described here.)
What temperature should a boat cable be?
Cables are also rated for their insulation temperature rating, or how much heat they can tolerate. Most boat cable today is rated at least 105 C, and this temperature rating should be found on the outer jacket insulation on the cable. Wiring that is too small for the job can generate significant, dangerous heat.
Where can I get a bonding lug?
This is what I usually see used in the field for bonding pipes of any kind. You can get them at Menards, Home Depot, Lowes, etc. They are pretty easy to install and self explanatory. Note the built-in bonding lug for the conductor.
Can gas piping be ground?
Refer to 2017 NEC Article 250.53 (B) (1) - Gas piping systems should not be used as a grounding electrode. Once a hundred years ago we were trained never to connect grounds to gas piping. The reason in the event of a ground fault electrical energy is transferred through the grounding system which could create a spark or heat that might ignite the gas.
Can you use gas piping in underground piping?
Due to the fact that most underground piping systems are no longer metal, some AHJ do want to see the gas piping used as part of a grounding electrode system. Personally I like my old training and it still isn't allowed by the NEC.