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proper usage. Prima low voltage transformers must be used with all Prima Lighting product installations. All warranties are void if Prima transformers are not used.
Prima's catalogs provide general information and suggestions for proper dimmer usage. Please consult our customer service department with any questions
installation. Adhere to all local and national electrical codes prior to installation.
Magnetic & Toroidal Transformer Information
IMPORTANT: USE ONLY LOW VOLTAGE DIMMERS WITH MAGNETIC & TOROIDAL TRANSFORMERS
Prima recommends the use of 10AWG THHN wire to maintain 25 amp capacity.
(Note: Using a dimmer may shorten the secondary length distance.)
Voltage Drop Formula
Class I
Wire Size
12V
(Gauge)
200
300
200
12
12'
n/a'
13'
19'
13'
20'
10
8
30'
20'
32'
Electronic Transformer Information
ELECTRONIC TRANSFORMERS ARE DIMMABLE
MUST USE LOW VOLTAGE ELECTRONIC DIMMER TO FULFILL PRIMA WARRANTY.
Prima recommends the use of 10AWG standard wire on output. Attach wires firmly with wire nuts.
AC Transformer
Wire Size (Gauge)
Wattage
12
50W
12
100W
12
150W
10
200W
10
300W
AC Transformer
Wire Size (Gauge)
Wattage
12
50W
Total Watts on Rail
X
Length of Run
Cable Size Constant
= Voltage Drop
Watts (VA) Per Circuit
13V
14V
15V
300
200
300
200
n/a'
13'
n/a'
15'
14'
22'
15'
23'
21'
34'
23'
37'
Class I Electronic Transformers
12V Length
Wire Size (Gauge)
30'
15'
10'
8'
5'
Class II Electronic Transformers
12V Length
25'
13615 Marquardt Ave. Santa Fe Springs, CA 90670
Ph. 562-407-3079 . Fx. 562-407-3069
www.primalighting.com
Cable Size
Cable Size
(Gauge)
Constant
12
7,500
11,920
10
18,960
8
Class II
Wire Size
Max. Length
(Gauge)
of Run (ft.)
300
n/a'
14
16'
12
25'
10
8
DC Transformer
Wattage
12V Length
12
150W
10
300W
25'
39'
63'
100'
20'
26'
REV. 052416
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