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circuit breakers heat up (and trip) at varying rates, it is
essential to understand the types of current ratings and how
they correspond to circuit breaker and cable specifications.
The maximum continuous RMS current is the maximum RMS
current over a duration of at least 10 seconds. It is used to
calculate the temperature increase in cables, which is used
to select cables that conform to electrical code standards.
It is also used to select the rating for slow-reacting thermal
breakers.
The maximum burst RMS current is the maximum RMS
current over a one second duration. It is used to select the
rating for most magnetic breakers.
The maximum instantaneous peak current during burst is
used to select the rating for fast-reacting magnetic breakers
and to calculate the peak voltage drop in long AC cables
according to the formula
Vpkdrop = Ipk x Rtotal cable
Use the table below as a guide to select cables and circuit
breakers with appropriate ratings for your operating voltage.
M
a
. x
C
n o
n i t
o u
s u
R
M
M
a
. x
B
u
t s r
R
M
S
M
a
x.
e P
k a
D
i r u
g n
B
u
The minimum electrical service amperage required by a system
of Meyer speakers is the sum of their maximum continuous
RMS currents. We recommend allowing an additional 30%
above the minimum amperage to prevent peak voltage drops
at the service entry.
Note: In the unlikely case that the circuit breakers trip
(the white center buttons pop out), do not reset the
breakers! Contact Meyer Sound for repair information.
P
C
W
OWER
ONNECTOR
IRING
Use the following AC cable wiring diagram to create
international or special-purpose power connectors:
earth
ground
AC cable color code
1
5 1
V
2
0 3
V
S
14
A
7
A
26
A
3 1
A
t s r
8 3
A
18
A
C
ONVENTIONS
chassis
ground
If the colors referred to in the diagram don't correspond to the
terminals in your plug, use the following guidelines:
• Connect the blue wire to the terminal marked with an N
or colored black.
• Connect the brown wire to the terminal marked with an L
or colored red.
• Connect the green and yellow wire to the terminal marked
with an E (or ) or colored green (or green and yellow).
S
I
AFETY
SSUES
Pay close attention to these important electrical and safety
issues.
Use a power cord adapter to drive the MTS-4A
from a standard 3-prong outlet (NEMA 5-15R; 125
V max).
blue =
neutral
yellow/green =
earth ground
1
0 0
V
(chassis)
16
A
The MTS-4A requires a grounded outlet. Always use a
30
A
grounding adapter when connecting to ungrounded
outlets.
42
A
Do not use a ground-lifting adapter or cut the AC
cable ground pin.
Keep all liquids away from the MTS-4A to avoid hazards from
electrical shock.
Do not operate the unit if the power cables are frayed or
broken.
Tie-wrap anchors on the amplifier chassis provide strain relief
for the power and signal cables. Insert the plastic tie-wraps
through the anchors and wrap them around the cables.
5
brown = hot
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