4
Active enclosure Installation
Your FLI UNDERGROUND enclosure is designed with a swift installation routine in
mind. Please mount the enclosure in a dry location on a solid surface. NEVER mount the
enclosure upside down, this will cause the ampli
fi
er to overheat and will eventually damage
the ampli
fi
er. Before
fi
xing the enclosure in place please ensure that there is suf
fi
cient air
fl
ow around the ampli
fi
er heatsink, at least two inches will be suf
fi
cient.
Power Cable
• At least a 10 gauge cable should be used for both the power and the ground connections to the
ampli
fi
er.
• The power cable should be taken directly from the battery. Rubber grommets should be used
when passing through any bulkheads to prevent the cable from becoming chaffed or cut.
• It is vital that a fuse / circuit breaker (of at least equal value to the one
fi
tted on the ampli
fi
er) is placed
in line with the power cable and is no further than eighteen inches away from the battery.
• Please ensure that the fuse is not
fi
tted until the entire installation procedure is complete.
• The two tables below are to help you decide on what cable is correct for you. The
fi
rst enables you to
select the size of cable depending on the length required. The second will help you convert the cable size
from American Wire Gauge to Metric if you need to.
Length of Run
Current demand
0 – 4 Ft
4 – 7 Ft
7 – 10 Ft
10 – 13 Ft
13 – 16 Ft
16 – 19 Ft
19 – 22 Ft
22 – 28 Ft
0–20 amps
14
12
12
10
10
8
8
8
20–35 amps
12
10
8
8
6
6
6
4
35–50 amps
10
8
8
6
4
4
4
4
50–65 amps
8
8
6
4
4
4
4
2
65–85 amps
6
6
4
4
2
2
2
0
85–105 amps
6
6
4
2
2
2
2
0
105–125 amps
4
4
4
2
0
0
0
0
125–150 amps
2
2
2
0
0
0
0
0
AWG
A
A
to Metric Conversion Chart
cross sectional area
AWG
A
A
Number
Inch
mm
mm2
0
0.325
8.25
53.5
1
0.289
7.35
42.4
2
0.258
6.54
33.6
3
0.229
5.83
26.7
4
0.204
5.19
21.1
5
0.182
4.62
16.8
6
0.162
4.11
13.3
7
0.144
3.66
10.5
8
0.128
3.26
8.36
9
0.114
2.91
6.63
10
0.102
2.59
5.26
1 M e t r e – 3 . 2 8 F e e t
