Also remember that is not Cresnet cable but obviously CAT5. Cresnet has a pair of 18 gauge for power and ground for their standard cable. The power being drawn and cable lengths will come into play. Make sure you're familiar with their cable length and wattage calculators...many problems can be avoided by ensuring the proper cable gauge is in place given distance and power demands. Also remember to leave headroom on your power supplying devices. I'm conservative and leave 30% headroom.

In your pic you're only using 2 conductors of 24 gauge which only gives you about 21 gauge. To get 18 gauge equivalent using CAT5 for power and ground you need to quadruple up 24 gauge to give you approximately 18 gauge. Here's a chart to help you with those calculations:

24 awg = 404 CM
23 awg = 511 CM
22 awg = 640 CM
21 awg = 812 CM
20 awg = 1020 CM
19 awg = 1290 CM
18 awg = 1620 CM
17 awg = 2050 CM
16 awg = 2580 CM

Sorry if this is all redundant for you but I cringe when I see Cresnet connections like that, plus you said you're somewhat new. Good luck on the take over project.