Deciding how to get power from one device to another can be a daunting task.
Selecting a means to convey large amounts of electricity requires some thought and consideration of a number of factors.
First, how much amperage is to be moved and at what voltage. For low voltage systems (600V and less) do you require a neutral? This will be largely determined by the type of load (lighting and/or 3 phase motors for example). Alternatively, the neutral could be achieved using a ground resistor. Essentially the decision is whether the system is to be 3 or 4 wire. For voltages above 600V, the system will always be a 3 wire system.
Secondly, to what degree do the cables need to be protected and to what degree do people and animals need to be protected from possible electrocution.
Thirdly, what sort of environment is the system operating in? Is it a combined indoor/outdoor application? Is it subjected to moisture or possibly condensation? Is there the potential for exposure to low concentration corrosive gases? Are there significant wind or snow loads? Will the system operate in high or low temperature or experience significant temperature swings?
Fourth, does the physical layout of the cable path require changes in vertical and horizontal direction? Are there any special fitting requirements to achieve direction change that would not be possible, or easily achievable, using standard fittings? If the system penetrates a wall or floor, does it require fire stop protection? Does the entry into switchgear or transformers require a weatherproof seal? Since most switchgear is sprinklerproof, it should be equipped with waterproof cable entry fittings.
Finally, what is the most cost effective way to achieve this. Don’t forget to include installation costs which are always a significant portion of the total cost. Also, is your labour highly skilled or do you need a solution which clearly spells out how the pre-fitted components are easily assembled.
Lots to contemplate but to make things really easy, contact us using the form below and we will give you an objective opinion!