Sealing between an electrical cable and a flexible metal conduit to be used in a high temperature, high vibration environment

A flame sensor apparatus including:

• a sensor assembly for sensing characteristics of a flame within a combustion chamber;
• an electrical assembly that is remote from the sensor assembly;
• and
• a cable assembly extending between the sensor assembly and the electrical assembly, the cable assembly including:
• a housing, wherein the housing defines an internal volume and the housing includes a first cable end portion and a second cable end portion;
• at least two cable fittings, wherein the first cable end portion and the second cable end portion are connected to a cable fitting through a first seal, each of the cable fittings defining a cable fitting opening;
• an electrical cable, wherein the electrical cable is inserted through the cable fitting opening in each cable fitting and through the internal volume of the housing;
• a second seal located in annular space between the cable and the cable fitting opening located at the first cable end portion, the second seal being configured to prevent moisture, gas, and contaminants from passing through the cable fitting opening;
• a third seal and at least one deformable sealing component located at the second cable end portion, the third seal and the at least one deformable sealing component being configured to prevent moisture, gas, and contaminants from passing through the cable fitting opening.

A method of sealing an electrical cable and a flexible conduit including:

• providing a housing, wherein the housing defines an internal volume and the housing includes a first cable end portion and a second cable end portion;
• connecting a cable fitting to each of the first cable end portion and the second cable end portion using a first seal, each of the cable fittings defining a cable fitting opening;
• providing an electrical cable, wherein the electrical cable is inserted through the cable fitting opening in each cable fitting and through the internal volume of the housing;
• sealing the annular space between the electrical cable and a cable fitting opening with a second seal at the first cable end portion, the second seal preventing moisture, gas, and contaminants from passing through the cable fitting opening;
• and
• sealing the annular space between the electrical cable and a cable fitting with a third seal and at least one deformable sealing component at the second cable end portion.