Sec. 18.307  Conduction limits.

    For the following equipment, which is designed to be connected to a 
low voltage public utility power line, the RF voltage conducted back 
into the power lines measured with a line impedance stabilization 
network (LISN) shall be limited to:
    (a) Ultrasonic equipment:

------------------------------------------------------------------------
                                       Maximum RF line voltage measured 
           Frequency (MHz)              with a 5 H/50 ohm LISN 
                                                 (V)           
------------------------------------------------------------------------
0.010-0.49..........................                 1000               
0.49-30.............................                  200               
------------------------------------------------------------------------

    (b) Induction cooking ranges manufactured after February 1, 1980:

------------------------------------------------------------------------
                                       Maximum RF line voltage measured 
           Frequency (MHz)              with a 5H/50 ohm LISN  
                                                     (mV)               
------------------------------------------------------------------------
0.010-0.1...........................         10-1 (linear interpolation)
0.1-0.5.............................                                   1
0.5-30..............................                                0.25
------------------------------------------------------------------------

    (c) RF lighting devices:

------------------------------------------------------------------------
                                       Maximum RF line voltage measured 
           Frequency (MHz)              with a 50H/50 ohm LISN 
                                                 (V)           
------------------------------------------------------------------------
Non-consumer equipment:                                                 
    0.45 to 1.6.....................                 1000               
    1.6 to 30.......................                 3000               
Consumer equipment:                                                     
    0.45 to 30......................                  250               

[[Page 690]]

                                                                        
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                                  Notes

    1. These conduction limits shall apply outside the bands specified 
in Sec. 18.301.
    2. For ultrasonic equipment, compliance with these conduction limits 
shall preclude the need to show compliance with the field strength 
limits below 30 MHz unless requested by the Commission.
    3. The tighter limits shall apply at the boundary between two 
frequency ranges.
[ 50 FR 36067 , Sept. 5, 1985, as amended at  52 FR 43198 , Nov. 10, 1987]