Ken, Good 'ole (and I do mean old) IPC-D-275 page 9 has a chart for calculating distance between conductors for voltage ratings. Anything above 500V Internal = V x .0025mm Exernal uncoated sea level to 10,000' = V x .005mm Exernal uncoated sea level above 10,000' = V x .0254mm Exernal with permanent polymer coating any elev. = V x .00305mm Exernal with conformal coating over assembly any elev. = V x .00305mm External component lead/ termination, uncoated = V x .00305mm External component lead/ termination, with conformal coating = V x .00305mm Happy trials to you, Barbara Burcham Sr Designer Halliburton Energy Services Houston [log in to unmask] > -----Original Message----- > From: Ken Brown [SMTP:[log in to unmask]] > Sent: Friday, September 18, 1998 12:13 PM > To: [log in to unmask] > Subject: [DC] FW: pcb design rules > > -----Original Message----- > From: Ken Bown [mailto:[log in to unmask]] > Sent: Friday, September 18, 1998 12:10 PM > To: [log in to unmask] > Subject: pcb design rules > > > LOOKING FOR DEESIGN RULES FOT PCB LAND SPACING VS VOLTAGE NEED TO APPLY > 2KV > BETWEEN LANDS AND CONNECTOR PINS. > REGARDS, KEN BOWN > DELTA V INSTRUMENTS > RICHARDSON. TX > > ################################################################ > DesignerCouncil E-Mail Forum provided as a free service by IPC using > LISTSERV 1.8c > ################################################################ > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in the body: > To subscribe: SUBSCRIBE DesignerCouncil <your full name> > To unsubscribe: SIGNOFF DesignerCouncil > ################################################################ > Please visit IPC's web site (http://www.ipc.org) "On-Line Services" > section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or > 847-509-9700 ext.312 > ################################################################ ################################################################ DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE DesignerCouncil <your full name> To unsubscribe: SIGNOFF DesignerCouncil ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################