EX12 · AC Power Requirements
Current Draw
115V Mode
230V, 250V
Max Long Term Continuous
5 A rms
2.5 A rms
Burst Current
7.5 A rms
5 A rms
Short Term Peak
20 A peak
10 A peak
Current Requirements
Each EX12 requires approximately 5 Amps max at 115V AC for proper operation. This allows up to three EX12's to be
powered from one 15 A breaker at 115V and up to 6 loudspeakers at 230V or 250V.
The EX12 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate depending on
quiet or loud operating levels. Since different cables and circuit breakers heat up 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 long-term continuous current is the maximum rms current during a period of at least ten seconds. It is
used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to electrical
code standards. It is also used to select the rating for slow-reacting thermal breakers.
The burst current is the maximum rms current during a period of approximately one second, used to select the rating
of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula:
V pk (drop)= I pk x R (cable total)
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table
below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.
AC Cable Color Coding
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 a N or colored black. Connect the brown wire to the terminal marked with
a L or colored red. Connect the green and yellow wire to the terminal marked with a E or colored green or green and yellow.
EX12 · A
C P
ow
er Requir
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ts
Power cable color coding
The EX12 requires a ground connection. Always use a grounded outlet and plug.
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