Samlex America Step 20 - Manual (Page 7)

6 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 7
SeCtIOn 4 | Installation
GeneraL inStaLLation reQuirementS
• Install the unit in a cool, dry, protected and well-ventilated space
• The unit may be installed on top of a horizontal surface or on the bottom of a hori-
zontal surface. The unit can also be installed horizontally on a vertical surface (For
safety, the Input / output terminals should not be pointing up or down to prevent
objects falling into the unit through the ventilation openings in the front and back
of the unit and short circuiting electrically live internal portions)
• The unit is cooled by convection through flow of cool air around the chassis surfaces
and through the ventilation openings in the front and back of the unit. ensure that
these openings are not blocked.
input anD output connectionS
!
caution!
pLeaSe enSure tHat tHe poLarity of tHe input / output connection iS not
reVerSeD. a reVerSe poLarity connection on tHe input SiDe WiLL bLoW inter-
naL \ externaL fuSe. tHiS internaL fuSe iS SoLDereD. DamaGe Due to reVerSaL
of poLarity iS not coVereD by Warranty.
Step 7 and Step 10
6.3 mm / 0.25”, “Quick Disconnect”, Male Spade terminal is used for input and output
connections (1 to 4, fig 1). Same type of terminal is used for grounding (5, fig 1).
Step 20
M-6 bolt and Nut are used for input / output connections. 6.3 mm / 0.25”, “Quick
Disconnect”, Male Spade terminal is used for Grounding (4, fig 2).
Wire SiZinG
Wire SiZinG for input anD output connectionS
Conductors used in wiring have resistance that opposes the current flow and produces
voltage drop and heating. the resistance is directly proportional to the length of the
conductor and is inversely proportional to the thickness (area of cross-section). thus, a
longer and thinner conductor will have higher resistance and will, therefore, produce
higher voltage drop and more heating. The size of a conductor is designated by AWG
(American Wire Gauge) #. for AWG numbers up to AWG # 1, the smaller the AWG num-
ber, the thicker the size of conductor. The size of conductor for a particular application
will depend upon (i) the maximum current it is required to carry (called Ampacity) at
specified temperature of the conductor / insulation and (ii) the voltage drop across the
distance over which this current is carried. The size of conductors should be determined
based on (i) the Ampacity and (ii) the maximum voltage drop of 2%, whichever is
thicker. the wires should be multi-stranded insulated copper rated for at least 105
ºC.