Safety Issues - Meyer Sound MM-4XP Operating Instructions Manual

■ Burst Current — The maximum rms current during a
period of around one second. The Burst Current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
■ Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic connectors.
You can use the following table as a guide for selecting
cable gauges and circuit breaker ratings for the system's
operating voltage.
Current Draw for MPS-488 with Eight MM-4XPs
Current Draw
(Eight MM-4XPs)
Idle Current 1.16 A rms
Maximum Long-Term 2.20 A rms
Continuous Current
Burst Current 3.6 A rms
Ultimate Short-Term 8.8 A peak
Peak Current
The minimum electrical service amperage required by an
MPS-488 is the sum of the Maximum Long-Term Continu-
ous Current for all MM-4XPs connected to the MPS-488. An
additional 30 percent above the minimum amperage is rec-
ommended to prevent peak voltage drops at the service
entry.
NOTE: For best performance, the AC cable
voltage drop should not exceed 10 V, or
10 percent at 115 V and 5 percent at 230 V. Make
sure that even with AC voltage drops that the AC
voltage always remains within the operating window.
115 230
V AC V AC
1.00 A rms 1.26 A rms
1.38 A rms 2.60 A rms
2.2 A rms
4.6 A peak 9.6 A peak

SAFETY ISSUES

Pay close attention to these important electrical and safety
issues.
■ The MPS-488 requires a grounded outlet.
100
V AC
■ Do not use a ground-lifting adapter or cut the AC cable
ground pin.
4.3 A rms
■ Keep all liquids away from the MPS-488 to avoid hazards
from electrical shock.
■ Do not operate the unit if the power cables are frayed or
broken.
MM-4XP OPERATING INSTRUCTIONS
Earth ground
Chassis ground
13