mgawatt
Member
- Location
- Buxton maine
Okay, ist thing, I am an electrician not an HVAC tech. I recently got involved in rfunning 12 mini split sytems that call for 60 amp 208Y to the outside unit and 20 amp 208Y to the inside head...no problem...Probelm started to manifest itself with the interconnect (control) PEQ terminals. On the units thart had the outside unit mounted inside (this is a huge factory installation), I used 18/3 t-stat cabvle (as the manufactuter suggested) and had no problems.
For the units wired outside, we used 14/3 UF solid, and had communications missues. The HVAC tech siad it was because the units needed stranded wiring to communicate properly, Yet, the 18/3 t-stat wire is solid and we have had no problems with that.
My wholesaler said there was a newer coated MC calble that the techs around here were using that contains 3 runs of 14 stranded...Has anyone here had more experience with these 4 ton units and can recommend the correct cable and size (face plate states =either 22/4 shieleded or 18/3)(Everything is installed seperate in a pvc conduit system for shielding requirements.
For the units wired outside, we used 14/3 UF solid, and had communications missues. The HVAC tech siad it was because the units needed stranded wiring to communicate properly, Yet, the 18/3 t-stat wire is solid and we have had no problems with that.
My wholesaler said there was a newer coated MC calble that the techs around here were using that contains 3 runs of 14 stranded...Has anyone here had more experience with these 4 ton units and can recommend the correct cable and size (face plate states =either 22/4 shieleded or 18/3)(Everything is installed seperate in a pvc conduit system for shielding requirements.