Tables Required for 70Amp PCB's

Can anyone suggest or identifiy standards which tabulate the following:

Conductor width, cross sectional and area conductor thickness for PCB's carrying up to 70 Amps?

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| Can anyone suggest or identifiy standards which tabulate the following: | | Conductor width, cross sectional and area conductor thickness for PCB's carrying up to 70 Amps? | Barry: Check:

1 Printed Circuits Handbook (Clyde F. Coombs) 2 Microelectronics Packaging Handbook (Tummala, Rymaszewski) 3 IPC-D-275 (now 2222, I think), figure 3-4 on page 10

Concerns I have are:

1 If using vias, how should they be designed, given that plated thickness is usually thinner and tougher to control. Earl where are you? 2 Etching 2oz copper a half inch wide (or whatever) doesn't seem to be a problem, but getting the current on and off the board seems more difficult.

Good luck

Dave F

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