Neutral wire position - Distribution system

[Foxh0und]

looking for standards & guidelines on Neutral Wire for distribution system, especially Neutral Up or Neutral High (neutral on top of the phase conductors), advantages & dis-advantages of it.

 

[berkeman]

looking for standards & guidelines on Neutral Wire for distribution system, especially Neutral Up or Neutral High (neutral on top of the phase conductors), advantages & dis-advantages of it.

Welcome to the PF.

Do you mean standards like the National Electric Code (NEC)? What kind of distribution systems are you referring to?

 

[Foxh0und]

what i means is manual & guidelines of utility companies regarding the moutning of distribution neutral wires.

 

[jim hardy]

Old lineman told me:

Neutral above acts as a lightning rod, helps keep it out of the phases.

Neutral below allows shorter poles.

Observe that large transmission lines are usually the former, obviously that helps system reliability. Local distribution at lower voltage is often the latter. I lived in a high lightning part of the country where most neutrals were above.

old jim

 

[alphysicist]

I understand the importance of having standards and guidelines in the distribution system to ensure safe and efficient operation. In regards to the neutral wire position, there are various factors that need to be considered when deciding whether to have the neutral wire located on top of the phase conductors (neutral up) or high above them (neutral high).

One advantage of having the neutral wire positioned on top of the phase conductors is that it can provide better balance and stability to the distribution system. This is because the neutral wire is located closer to the phase conductors, which can help reduce the voltage drop and improve the overall performance of the system. Additionally, having the neutral wire up can also make it easier to access and maintain, as it is more visible and less likely to be obstructed by other components.

However, there are also some disadvantages to having the neutral wire up. One potential issue is the increased risk of contact with the phase conductors, which can be dangerous for workers and the general public. This can also lead to power outages and damage to equipment if the neutral wire comes into contact with the phase conductors. Furthermore, having the neutral wire up can also make it more challenging to detect and repair faults in the system, as the neutral wire may be hidden or harder to access.

On the other hand, having the neutral wire located high above the phase conductors can offer some advantages. One major benefit is the increased safety as it reduces the risk of contact with the phase conductors. This can also make it easier to identify and repair faults in the system, as the neutral wire is more visible and accessible. Additionally, having the neutral wire high can help reduce the risk of damage to the neutral wire from animals or vegetation.

However, there are also some drawbacks to having the neutral wire high. One potential issue is an increased voltage drop, as the distance between the neutral wire and the phase conductors is greater. This can lead to a decrease in the efficiency and performance of the distribution system. Additionally, having the neutral wire high can make it more challenging to access and maintain, as it may require specialized equipment or additional safety measures.

In conclusion, the decision of whether to have the neutral wire positioned up or high in the distribution system should be based on a thorough evaluation of the specific system and its needs. It is essential to consider factors such as safety, efficiency, and ease of maintenance when determining the best location for the neutral wire. Standards and guidelines can also provide