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Subject:
IPC2221 Electrical Conductor Spacing Requirements
From:
Steven Schell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steven Schell <[log in to unmask]>
Date:
Mon, 28 Jan 2019 10:54:30 -0600
Content-Type:
text/plain
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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.

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