Fellow TechNetters:



    Is there an inter active online electrical conductor spacing calculator in which you plug in numbers and some sort of response is provided?

Perhaps a CADCAM software.

Is the PTH copper barrel thickness plays a part in this scenario.



Victor,



-----Original Message-----

From: TechNet <[log in to unmask]> On Behalf Of Steven Schell

Sent: Monday, January 28, 2019 10:55 AM

To: [log in to unmask]

Subject: [TN] IPC2221 Electrical Conductor Spacing Requirements





[EXTERNAL EMAIL] 



Hello  Technetters,



I am trying to interpret the electrical clearance requirements in the IPC2221A standard, under section 6.3.

Table 6-1 lists minimum spacing requirements for various voltage ranges between conductors.

The table indicates that this is for AC or DC peaks.

I am trying to interpret that last part.

Our application has a tracking power supply that provides a variable DC output voltage.  The average DC voltage is between 16 and 30V, but the peak instantaneous DC voltage exceeds 31V.  

In this case, should I be complying with the minimum spacing requirements for 16-30V, or should I be complying with the minimum spacing requirements for 31-50V.



I guess I am not clear what the intent of the voltage thresholds is.



Thank you for any help or insight.