Hi Alex, In my view the dielectric strength test and insulation thickness are not alternative solutions but must be met concurrently. I don't think that you would get an accredited test house to concur with your solution, but it may be worth asking the question. I have found that most test houses are quite prepared to answer simple questions such as this (up to 15 minutes of their time seems to be a rule-of-thumb) without wanting to invoice you. Best regards,
Neil R. Barker Compliance Engineering Manager e2v technologies ltd Waterhouse Lane Chelmsford Essex CM1 2QU U.K. Tel: +44 (01245) 453616 Fax: +44 (01245) 453410 E-mail: [email protected] From: Alex McNeil [mailto:[email protected]] Sent: 18 September 2003 08:04 To: [email protected] Subject: PSTN + Signal Cable Hi Colleagues, Does anyone foresee a problem if I route the PSTN and Signal wires within the same cable? I am thinking of a particular application where the above scenario would fit well in my design. I ensure that the 1.6mm (and 2.0mm for re-inforced insulation) spacing requirement is met on the PCB connector and PCB tracking. The only problem I see is the cable insulation does not meet the 0.4mm thru insulation requirement but the manufacturer will test the cable for 1500Vrms dielectric strength between the PSTN wires and the Signal wires, 100% of production and produce a CoC. Or must I specify that the wire insulation meet the 0.4mm thru insulation requirement? Thanks in advance of your replies. Kind Regards Alex McNeil ________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs Email Security System. ________________________________________________________________________
