Nace CP 1, Course Manual

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Installing C.P. Components 8:2
CP 1 – Cathodic Protection Tester Course Manual
©
NACE International, 2000
07/01/04
Where electrical bonding of joints on ductile iron or mechanically joined steel
is involved, frequent test stations permit testing of the bonding and/or the
detection of broken bonds.
Environmental Factors
There are many situations where it would not be physically possible to make
meaningful tests unless a suitable test station is installed at the time of
construction–piping systems installed under concrete flooring, for example.
Unless test facilities are provided at the time of construction, it is unlikely that
they could be installed economically should they become necessary at a later
date.
Other conditions such as restricted areas or hazardous locations may have
unusual test station requirements.
Construction Notes
The structure and test lead wires should be clean, dry, and free of foreign
materials at points of connection when the connections are made. Test lead
wire connections to a structure must be installed to remain mechanically
secure and electrically conductive.
All test lead wire attachments and all test lead wires should be coated with
electrically insulating material. If the structure is coated, the insulating
material should be compatible with the structure coating.
Conductors should be color-coded or otherwise permanently identified.
Wire should be installed with slack. Damage to insulation should be
avoided, and repairs should be made if damage occurs. Test leads should
not be exposed to excessive heat or sunlight. Above ground test stations are
preferred. If test stations are flush with the ground, adequate slack in the
conductors should be provided within the test station to facilitate test
connections.
Conductor connections at bonds to other structures or across isolating joints
should be mechanically secure, electrically conductive, and suitably coated.
Bond connections should be accessible for testing.