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Electrical Wire & Wiring Supplies for Boats by CDI Electronics

Products: 1 - 4 of 4
511-9766 - Spark Tester - Push In Tips 511-9766 Spark Tester

511-9766 - Spark Tester - Push In Tips 511-9766 Spark Tester

Mfr. CDI Electronics | Mfr No. 511-9766

▪ Sealed design reduces possibility of fire ▪ Can be used to test 1-8 Cylinders
$72.24


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511-9770 - Piercing Probe Set 511-9770 Piercing Probe Set

511-9770 - Piercing Probe Set 511-9770 Piercing Probe Set

Mfr. CDI Electronics | Mfr No. 511-9770

*Includes 1 Red & 1 Black Probe• Fully insulated probes with spring loaded clamp • Probes with stainless steel pin self-centers & punctures insulation
$99.24
On Sale


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511-9773 - Adaptor, Peak Reading 511-9773 DVA Adapter

511-9773 - Adaptor, Peak Reading 511-9773 DVA Adapter

Mfr. CDI Electronics | Mfr No. 511-9773

▪ Built in test leads ▪ Replacement tips fit most test clips
$86.46


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989-8109 - Heatsink Compound TYPE29 989-8109 989-8109 Heat Sink Compound

989-8109 - Heatsink Compound TYPE29 989-8109 989-8109 Heat Sink Compound

Mfr. CDI Electronics | Mfr No. 989-8109

Recommended for use when mounting rectifiers and regulators on Chrysler, Force, Mariner, Mercury, Nissan, Suzuki, Tohatsu, and Yamaha Engines.Type 29 Heat Sink Compound, will not harden or dry out.
$27.00
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Products: 1 - 4 of 4
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Post a question or comment about Electrical Wire & Wiring Supplies for Boats to our online boating community.
Question
Wire Corrosion

My friend is telling me that electricity mainly travels along the outside surface of a wire. This is very hard be believe….why would electrons not move thoughout the complete cross section of a wire. Thus corrosion on the outer surface of a single strand wire could potentially cut of the flow of electricity.
Is this baloney or what??

Submitted by: Steve
Answer

It depends on what type of electric current you are talking of.

In case of AC current,the inductance decreases from center towards the surface of the wire. As current flows through the path of least resistance, it flows through the surface of the wire which provides path of least Reactance. This phenomena where current flows through the surface due to least reactance is known as "Skin effect".

While in case of DC current the inductance part is missing as there is no change in flux with respect to time. So the resistance is same through out the conductor. Hence DC current flows through out the wire cross-section.

If,you visit any power GRID you’ll see the bus bars are hollow. This is because current flows through the outer surface so bars are kept hollow to carry same current, avoiding material wastage.


 
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