I have a airhandler that has the wires comeing from the disconect to the unit protected in greenfield. Attached to the unit is a junction box where the wires enter the unit. They are THHN and are physicaly unprotected. The wires enter the pecker head through a chase nipple, then terminated with wire nuts. Access to this area is through a hinged door. Dosen't look right to me. Any help !!!!