Conductor Spacing Minimums
| Voltage between
conductors
DC or AC PEAK (Volts) |
Uncoated
traces 0-10,000 ft
IPC ML 910A |
Uncoated
above 10,000 ft
Alt.
IPC ML 910A |
Coated &
Internal Layers
MIL STD 275D & IPC ML 910A |
Voltage between
conductors
DC or AC PEAK (volts) |
| 0 |
0.015" (0.38 mm) |
0.025 " (0.64 mm) |
0.005 "
(0.13mm) |
0 |
| 15 | 15 | |||
| 16 | 0.010"
(0.25mm) |
16 | ||
| 30 | 30 | |||
| 31 | 0.015"
(0.38 mm) |
31 | ||
| 50 | 50 | |||
| 51 |
0.025" (0.64 mm) |
0.060"
(1.52mm) |
0.020"
(0.51 mm) |
51 |
| 100 | 100 | |||
| 101 |
0.125" (3.18 mm) |
0.030" (0.76mm) |
101 | |
| 150 | 150 | |||
| 151 |
0.050" (1.27mm) |
151 | ||
| 170 | 170 | |||
| 171 | 0.250"
(6.35 mm) |
171 | ||
| 250 | 250 | |||
| 251 |
0.500" (12.70 mm) |
251 | ||
| 300 | 300 | |||
| 301 | 0.100"
(2.54mm) |
0.060
(1.52mm) |
301 | |
| 500 | 500 | |||
| 500+ | 0.0002
in/volt (0.0051 mm/volt) |
0.0010 in/volt
(0.0030 mm/volt) |
0.00012 in/volt
(0.00305 mm/volt) |
500+ |
* Reprinted from the Bishop Catalogue.