You can use this wire to span spaces or extend your customer installations.
What exactly is the difference between SPT-1 and SPT-2?
SPT-1 insulation is standard commercial grade thickness used for years in the industry. The SPT-2 insulated bulb wire has a slightly thicker insulation that is suited for commercial off-season applications and is popular with our customers who own restaurants and shopping malls.
No matter what thickness of insulation, the wire is still rated at 10 amps. (There is some misinformation floating around the web that SPT-2 has a higher current rating. That information is incorrect.)
As with all of our cut to fit and customer commercial spools, consult with a master electrician during installation. The maximum line length of 18 AWG wire is 250 feet.