Get the various types of GRP Cables trays

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TYPES OF THE GRP CABLE TRAYS
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INFORMATION

• Among the many uses of GRP, its role in the
  electrical infrastructure is one of the most
  widespread.
• GRP cable trays are a common sight in any kind of
  electrical installation today.
• GRP has virtually replaced all other type of
  conduits, including metal and plastic pipes that
  were previously used to carry wires and cables.
• Today GRP offers us a long-term, durable,
  cost-effective and efficient solution.
• It is a product that is uniquely suited for the
  purpose of carrying cables and wires.
• Not only has it replaced the older materials like
  aluminum and steel, it also uses a new form
  trays.
• The earlier conduits were pipes through which the
  cables would be laid out.
• Trays have obvious advantages of a better layout.
  
• The structure of GRP trays also makes it possible
  for to check the cables.

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TYPES OF GRP CABLE TRAYS

• GRP cable trays can take many shapes and forms.
• The different shapes have their own advantages
  and each shape is chosen for a particular reason.
• Some may work better in certain environments,
  while some may work better with a certain type of
  cables.

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SOLID BOTTOM TRAY

• As the name suggests, these trays have a solid
  bottom.
• In fact, the tray completely encloses the cables
  on all sides.
• This is obviously one of the best ways of
  protecting the cable for corrosives or bad
  weather conditions.
• Weather conditions could include strong sun, wind
  or rain.
• Environments like a chemical factory or marine
  structures are also highly corrosive.
• The close bottom tray will protect the cables
  from harsh weather conditions, saltwater,
  chemicals or other corrosives.
• But there are also certain disadvantages that
  come with a closed trays.
• Easy inspection are impossible because one must
  cut the tray to get access to the cables.

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CONTINUE

• This means that you have to take apart the tray
  and put a new one post inspection.
• Closed trays also accumulate dirt, damp and
  water.
• Closed trays can also result in heat build up
  where cables are packed closed together and are
  prone to heating.
• This is why only cables that do not heat are used
  in this kind of arrangement.

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VENTILATED THROUGH TRAY

• This gives us slightly more access than the
  closed trays.
• It has an opening at the bottom, through which
  the cables can be inserted or taken out.
• The opening allows for air circulation and water
  to drain.
• The trays are closed at the top because the
  closure stops objects or dust from falling
  inside.

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LADDER CABLE TRAYS

• This type of cable gets its name from its ladder
  like structure.
• It has traverse bars placed at regular intervals,
  typically at a distance of 9 inches from each
  other.
• The traverse bars are designed to support the
  cable.
• The rungs of the ladder provide an anchor for the
  cables.
• The ladder structure means that the tray is a
  very open structure.
• It allows for the maximum possible air
  circulation.
• This makes it perfect for cables that are prone
  to overheating.
• However, the open structure also means that the
  cables inside are exposed to weather conditions.
• To mitigate the effects of any corrosion, ladder
  GRP cable trays can come with one variation
  some of them come with a cover.
• The cover can be taken off, giving us an easy
  access but covering the cables at the same time.
  The cover could be on one side or on both sides.

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Wire mesh cable trays

• The wire mesh trays offer one of the most open
  structure in GRP cable trays.
• Structured like wire mesh, the trays allows for
  maximum air flow from all sides.
• This allows the cables to stay cool. This kind of
  tray is ideal for cables that are prone to
  overheating.
• Wire mesh cable trays are used for
  telecommunication cable networks and low voltage
  fibre optic applications.

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Trough cable tray

• This type of tray is used when there are many
  cables.
• The trough provides a deep basin for the cables
  where more than the usual number of cables can be
  bunched together.
• This arrangement works best with cables that are
  not prone to heating.

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SINGLE RAIL CABLE TRAY

• This type of GRP cable tray is similar to a
  ladder tray, except that the vertical bar runs
  through the centre of the rungs.
• The bar provides anchor to the cables, while the
  evenly placed horizontal trays offer an open
  structure.
• This type of cable trays are most suitable for
  cables prone to overheating or in situations
  where we want quick access to the cables.
• Its obvious disadvantage is that the open
  structure also makes the cable vulnerable to
  environmental corrosion.

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