Why is there green goo seeping out of my sockets and switches?

What is Green Goo?

So what exactly am I referring to? 

Those affected by the presence of "Green Goo" in their Rotherham property will observe a dark green substance seeping from switches and sockets, resembling Fairy Liquid, and possessing a sticky texture. In some instances, it may remain inconspicuous until electrical work is undertaken, while severe cases may entail the substance dribbling down walls beneath electrical outlets.

What causes this green goo?

Essentially, it stems from a flaw in the manufacturing process of early PVC cable. To simplify, PVC (polyvinyl chloride) requires the addition of a plasticiser to render it malleable for cable use. Unfortunately, the early plasticisers reacted with the copper in the cable when exposed to certain temperatures.

The concerns surrounding this issue span from its potential impact on electrical safety to its effects on health. Regarding electrical safety, the degree of risk largely hinges on the load and usage. Elevated conductor temperatures prompt greater plasticiser
leaching, leading to cable brittleness and eventual degradation. Moreover, the goo substance itself can impede accessory functionality. In terms of health risks, contact with the Green Substance can result in conditions such as dermatitis or rashes. Consequently, precautions should be taken to prevent skin contact.

What can be done?

Regrettably, if an installation is significantly affected, the only viable solution is a complete rewiring. Mere replacement of outlets or accessories provides only a temporary fix, as the underlying issue persists.

If you're concerned about your property, contact Harrison Electrics who can conduct a simple insulation resistance test to assess the extent of cable deterioration.