I went to the big box store and asked for 40 feet of 22-4 security wire and when I got home noticed it was actually 18-4. I am relocating my keypad to a new location and was wondering if the change would effect the system. So I am going to keep the existing wire from the control panel that is 22-4 and just extend with the new wire. Can I use the 18-4 to extend or should I return it and get the 22-4 to finish the extension?

Thanks
M

No problem using it, just overkill.