Leadership

Electrolysis Ordinance in Chicago

Issue 12 and Volume 52.

Electrolysis Ordinance in Chicago The city council of Chicago has recently passed an ordinance requiring certain electrical equipment to prevent damage by electrolysis. It requires that the difference of potential between any two points on a return circuit must not exceed 12 volts and between any two points on the return 1,000 feet apart, within one mile radius of the city hall shall not exceed the limit of one volt, while between any two points on the return 700 feet apart, outside of this mile radius, it will not exceed the limit of one volt. Return current amperage on pipe and cable sheaths must not be more than five tenths ampere per pound-foot for caulked cast iron pipe, and eight amperes per pound-foot for screwed wrought iron pipe, and 10 amperes per pound for standard lead or lead-alloy sheaths of cable.

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