If it could be risky for people, why is not a Code issue?

[ARIKSON ESPINAL]

As we already know, Voltage drop shall not be below 5% at the load source. To find the proper wire size, one needs to know the type of conductor (copper or aluminum), the distance, and the amps that are needed for the load. After that, we select the wire size and then calculate the drop.

Now, truth is you shouldn't have much voltage "drop". IF you found it in a well designed circuit, it normally means that there is a poor connection somewhere along your service line or inside wiring. Any significant amount of voltage drop can mean that you are at risk of a fire.

Based on that, Voltage drop should be a Code Issue. If not, why not?

Regards

 

[charlie b]

As we already know, Voltage drop shall not be below 5% at the load source.

We know no such thing. There are no ?shall? or ?shall not? statements in the NEC, with regard to voltage drop.

Voltage drop should be a Code Issue. If not, why not?

It is not, and it should not. The reason is that it is not a safety issue. If the voltage to a motor, for example, is 20% low, it will cause a high current to flow, the motor may trip, and who knows how that is going to impact the business operations of the company. But the code has no concern over the efficient, convenient, or adequate operation of the power distribution system. In fact, the code says so, in Article 90.1(B).

Welcome to the forum.

 

[coulter]

...IF you found it in a well designed circuit, it normally means that there is a poor connection somewhere. ... Any significant amount of voltage drop can mean that you are at risk of a fire. ...

... Based on that, Voltage drop should be a Code Issue. ...

Just so I know I am translating correctly - You are saying, "In a well designed circuit, Vd is a loose connection."? If that's it, I agree. However, in this context, Vd is a symptom of a problem, not the cause.

And the cause, loose connections, is against the code: 110.3.B, 110.10, 110.12, 110.14.A and B - and likely plenty more.

carl

 

[bphgravity]

Chech your local building code. Here in Florida, voltage drop is limited in Chapter 13 - Energy Efficiency. While I agree excessive voltage drop could lead to a hazard, it is mostly a design issue and an energy issue.