Operating instructions

CAL OPERATING INSTRUCTIONS
11
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)
The Burst Current can also be used to calculate the AC
looping capability of CAL.
Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.
Inrush Current — The spike of initial current encoun-
tered when powering on.
You can use the following table as a guide for selecting
cable gauges and circuit breaker ratings for the system’s
operating voltage.
The minimum electrical service amperage required by a CAL
loudspeaker system is the sum of the Maximum Long-Term
Continuous Current for each loudspeaker. An additional
30 percent above the minimum amperage is recommended
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 win-
dows.
ELECTRICAL SAFETY ISSUES
Pay close attention to these important electrical and safety
issues.
CAL requires a grounded outlet. Always use a grounded
outlet and plug.
Do not use a ground-lifting adapter or cut the AC cable
ground pin.
Make sure the AC power cable for the loudspeaker has
the appropriate power plug (on the other end) for the
area in which you will operate the loudspeaker. In addi-
tion, the AC power cable must be rated for the total cur-
rent draw of all loudspeakers looped from the power
source.
Do not operate the unit if its power cable is frayed or bro-
ken.
Keep all liquids away from CAL loudspeakers to avoid
hazards from electrical shock.
CAL Current Draw
Current Draw Model 115 V AC 230 V AC 100 V AC
Idle Current CAL 96 1.98 A rms 1.63 A rms 2.32 A rms
CAL 64 1.24 A rms 0.99 A rms 1.42 A rms
CAL 32 0.58 A rms 0.45 A rms 0.65 A rms
Maximum
Long-Term
Continuous
Current
CAL 96 8.3 A rms 4.2 A rms 9.4 A rms
CAL 64 6.1 A rms 3.1 A rms 6.9 A rms
CAL 32 3.3 A rms 1.7 A rms 3.7 A rms
Burst Current CAL 96 14.7 A rms 7.3 A rms 18.5 A rms
CAL 64 10.8 A rms 5.4 A rms 13.6 A rms
CAL 96 5.9 A rms 2.9 A rms 7.4 A rms
Ultimate
Short-Term
Peak Current
CAL 96 33 A peak 18 A peak 40 A peak
CAL 64 24 A peak 13 A peak 29 A peak
CAL 32 13 A peak 7 A peak 16 A peak
Earth ground
Chassis ground