Hi Victor IPC-610 Rev F, page 6-12 (section 6.2.1.2 'Insulation-Damage-Post Solder'), says; Acceptable (class 1,2,3) - 'slight melting of insulation'. Go careful with the photo on that one, as it looks rather charred to me, which would be a defect!! I know 'slight' is rather objective, but I would say, as long as it appears to be insulating the wire, at that point, & it's not charred/burnt, then that's acceptable. Paul Pidgeon [Certified IPC Trainer] STEM Training, UK -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Yuan-chia Joyce Koo Sent: 21 April 2017 00:44 To: [log in to unmask] Subject: Re: [TN] IPC Standard i think damaged insulation is not acceptable according to 610 visual if I remember correctly. On Apr 20, 2017, at 11:01 AM, <[log in to unmask]> <[log in to unmask]> wrote: > Fellow TechNetters: > > Is there a STANDARS for insulated wire cable soldering onto a > PWB? Is melted terminating insulation acceptable? > > Victor,