zappedagain
Electrical
- Jul 19, 2005
- 1,074
I'm going through the IEC 60079-## series and getting some mixed messages about the cables, specifically regarding ESD. There are lots of restrictions on non-metallic materials, and they exclude the cables.
Teflon, for example has a typical surface resistivity of 10^18 ohm/sq, while the spec calls for non-metallic materials with SR less than 10^9 ohms. If the cables are excluded, can I really use cables with Teflon insulation without generating ESD events and causing things to explode?
This seems counter intuitive. Does anyone have experience with this? Am I missing something? Are the cables spec'd somewhere else?
If anyone really wants to dig into this, I'll post my path through the standards so far if there is interest. I'm attempting to prove that my equipment meets the Intrinsic Safety "is" specs.
Thanks,
John D
Teflon, for example has a typical surface resistivity of 10^18 ohm/sq, while the spec calls for non-metallic materials with SR less than 10^9 ohms. If the cables are excluded, can I really use cables with Teflon insulation without generating ESD events and causing things to explode?
This seems counter intuitive. Does anyone have experience with this? Am I missing something? Are the cables spec'd somewhere else?
If anyone really wants to dig into this, I'll post my path through the standards so far if there is interest. I'm attempting to prove that my equipment meets the Intrinsic Safety "is" specs.
Thanks,
John D