Current Requirements; Power Connector Wiring - K-array KH4 User Manual

4. CURRENT REQUIREMENTS

The KH4 or KS4 presents a dynamic load to the AC mains, which causes the amount of current to fluctuate between quiet and 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 continuous RMS current is the maximum
RMS current in a period of at least ten 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 cable size and gauge and the rating for slow-reacting
thermal breakers. The maximum burst RMS current is the maximum RMS current in a period of approximately one second. 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:
V pk (drop)= I pk x R (cable total)
For best performance, the AC Cable voltage drop should not exceed 10 Volts, or 10% at 115V and 5% at 230V. Use
Table 1 below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.
The minimum electrical service amperage required by a system of KH4 or KS4 is the sum of their maximum
continuous RMS current. We recommend allowing an additional 30% above the minimum amperage to prevent peak
voltage drops at the service entry.
KH4 and KS4 Current Rating:
115 VAC = 20A Max Continuous RMS
230 VAC = 10A Max Continuous RMS
5. POWER CONNECTOR WIRING CONVENTIONS
The KH4 or KS4 requires a grounded outlet. It is very important that the system be properly grounded for both safety and proper
operation. Use the following wiring diagram to create power cables and distribution systems.
USER'S MANUAL
CAUTION
The KH4 or KS4 requires a ground connection. Always use a grounding
outlet when connecting these units.
CAUTION
Do not operate the unit if the power cables are frayed or broken.
CAUTION
Keep all liquids away from the KH4 or KS4 amplifiers to avoid hazards from
electrical shocks.
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