The risk is dropping 24VDC across the Ethernet…
The power supply might be able to take it but the NIC chip might not. Plastic crimps just have a much shorter lifespan on the dies, but if they are only used to crimp hot connections they should last a while From: Af [mailto:[email protected]] On Behalf Of Mathew Howard Sent: Thursday, February 19, 2015 11:12 AM To: af Subject: Re: [AFMUG] Cat5/6 POE splicing while live? I'm pretty sure I've seen plastic crimpers, but I don't know that I'd trust them to do a decent crimp... It doesn't seem to hurt most power supplies, but I always try to be quick about it when I do it... it all depends on the situation though, in some cases it isn't worth the risk even if it is small. On Thu, Feb 19, 2015 at 12:40 PM, Bill Prince <[email protected] <mailto:[email protected]> > wrote: That's just the first issue. As someone else mentioned, you also short all the pins together when you crimp the RJ45 on. Are there plastic or ceramic crimpers? bp <part15sbs{at}gmail{dot}com> On 2/19/2015 10:36 AM, Ken Hohhof wrote: I guess you could buy ceramic scissors like these: http://www.mtesolutionsinc.com/11802-Ceramic-Scissors-5-p/11802.htm -----Original Message----- From: Bill Prince Sent: Thursday, February 19, 2015 12:22 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] Cat5/6 POE splicing while live? Gotta be careful. If you cut across all the pairs at the same time, you will definitely short the output of the POE injector. Newer ones might be able to deal with that as long as the short doesn't last too long. However, you can usually cut each color separately without doing any harm. The challenge is getting them the same length. bp <part15sbs{at}gmail{dot}com> On 2/19/2015 10:13 AM, Sterling Jacobson wrote: Is it possible to cut into a POE injected Cat5/6 run without frying stuff? I think I've done it on regular Ethernet without causing damage to the Ethernet port, but maybe I'm pushing it with that too? I know the safest way is to unplug the Ethernet cable, then do the splice/work/end on it, then plug it back in, but would be really nice if I didn't have to bother the home owner when fixing/splicing a live run to the outside of the house.
