(4) Bonding of Electrically Conductive Materials and Other Equipment. Normally non–current-carrying electrically conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path .
What is the purpose of a bonding jumper?
For our typical AC electrical system, the purpose of the “Main Bonding Jumper” is to connect the equipment grounding conductors (E.G.C.) contained in each branch-circuit and the metal (conductive) service-disconnect enclosure to the Neutral Conductor of the electrical service .
What is bonding of electrical equipment?
What is bonding? Bonding is used to reduce the risk of electric shocks to anyone who may touch two separate metal parts when there is a fault somewhere in the supply of electrical installation. By connecting bonding conductors between particular parts, it reduces the voltage there might have been.
Why do we bond conductive materials together?
Bonding items together and connecting the bonded items to an equipment grounding conductor places everything at the same potential and ensures an effective ground-fault current path in the event of a fault to ground occurring in an electrical system circuit.
Why do you ground normally non current carrying conductive materials enclosing electrical equipment?
For grounded systems, normally noncurrent-carrying conductive materials enclosing electrical conductors or equipment shall be connected to earth so as to limit the voltage-to-ground on these materials .
Which of the following electrical systems is not required to be grounded?
Alternating-Current circuits that operate at less than 50 volts are not required to be grounded unless, Figure 3: The primary to the power suply exceeds 150 volts to ground.
When using a bonding jumper for a main service What is the size of the jumper based on?
Also, the size of the bonding jumper for each raceway is based on the size of service-entrance conductors in each raceway . As discussed earlier, conductors larger than given in Table 250-66 are required for larger services.
What is the difference between electrical bonding and grounding?
Bonding is the connection of non-current-carrying conductive elements like enclosures and structures. Grounding is the attachment of bonded systems to the earth. Both are necessary to safeguard people and property from electric hazards.
How is electrical bonding done?
Equipotential bonding involves electrically connecting metalwork so that it is at the same voltage everywhere. ... Equipotential bonding is done from where the distribution wiring enters the building to incoming water and gas services .
How do you test for bonding and grounding?
Ground bond testing requires application of a high current source to a conductive surface of the product and measurement of the voltage drop across the ground connection . This is to determine that bonding is adequate and that the circuit can carry the specified current safely.
What is the difference between bonding and grounding when transferring flammable liquids?
Use bonding wire while pouring liquids into other containers. Bonding wire connects can to funnel. Grounding wire connects drum to earth ground .
How do I know if my pool is bonded?
Look for an exposed copper wire attached to the motor and pumps , going into the ground. It should connect in a similar way as in the image to the left. If you live in a municipality, you can also contact the building and inspection department to see if your pool had a code inspection during its construction.
Should you ground electrically conductive materials and equipment?
Normally non– current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected to earth so as to limit the voltage to ground on these materials.
What shall be connected to the electrical grounding system?
Article 100 of the NEC defines ground as “the earth.” Section 250.4(A)(1) states that grounded electrical systems “shall be connected to earth in a manner that will limit the voltage imposed by lightning, line surges, or unintentional contact with higher-voltage lines and that will stabilize the voltage to earth during ...
How are the non current-carrying parts of electrical equipment required to be installed?
As discussed in the previous section, all non-current-carrying components of electrical equipment must be grounded and bonded . Equipment grounding conductors are installed and connected to the required terminal in the equipment to provide the low-impedance path for fault current to clear the circuit.
