_
Electrical liiStallation
91
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ly-to any value up
to full
so that lie-can eXperiment. and
arrive at an optimum system without expensive substitution. The use
of a time switch allows the aquarist to set the period of illumination -
“'
automatically to, suit the environment, and also ensures day to day
constancy. lt is quite a simple thing to installand use, and thetype
supplied for d0mestic central heating is most suitable and widely
available. Both these appliances can be used together if connected
one after the other in the supply line, and both must of course be
‘
able to carry the full current drawn by the lighting circuit at any
time.
ELECTRÏCAL lNSTALLATION AND SAFETY
in this section it is hoped to explain enough ab out aquarium electriCa—l
installations
to enable the aquarist to install his equipment in a safe
and reliable manner. Many sources of information evadethis question
by‘advising the aquarist to consult a competent electrician (as has in
'
'
Thermostat
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'
Fuse À_
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,
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l
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ï
Fuse
.
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Màîns
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w
Ddùble.‘polèŸ
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switch
f
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Fuse C
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:w'
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z:
,
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.,
,
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‘ëenrrections for “atypical "aquarium—. Fuse A must _beableto
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-» carry ‘theJWhole current
B and C should
to match the
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7} f ‘; Jahd=thèî
By this means, a fault which blows
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the heating cii_cuit.- If there is a Short
“'
li' system,fuse AWillwblOW and both thepump and the lights will
tubecanbeSUbstuted f0r theïungSten ‘lamPS by
X3ndY
AHSW1tchesandfuses must-he rated to cal—rr,
which &… failure “idf ihÇe
::Â ;}ië
notaffecttheanpump
a, crgwd‘edaquanum
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…
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