# When single core cables laid in trefoil formation what clamping materials should be used?

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I am assuming you are referring to high voltage cables. These clamps must be designed to withstand the large electromagnetic forces that result during a short circuit. This is their main purpose. The electromagnetic forces can be simplified as an impulse. The impulse (of duration ~0.2s I believe) causes the core of a cable to accelerate within the elastic region of the clamp and insulation material until these materials are stretched sufficiently to provide an equal and opposite reaction force. Upon reaching this "equilibrium" position, the core and insulation will have acquired a certain amount of kinetic energy such that in the absence of any damping effects they will continue to move within the elastic region of the clamp and insulation until a reaction force equal to twice the magnitude of the impulse is reached.

So we need a material with a high yield strength to resist this large force without plastic deformation.

In short, materials that have been proven suitable for this use are: Aluminium alloy LM25 which offers a good level of corrosion resistance. In situations where exceptional corrosion resistance is needed, Polyamide 6/66 with glass reinforcement (30% fibre should be acceptable) and PET with glass reinforcement (30%) have had proven success. Note that with its higher yield strength the polyamide is the better choice of the two composite materials. Polyamide in general is vulnerable to UV light, this problem can be solved by either coating the clamps or using a UV resistant blend.
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# When you clamp a single core cable carrying about 500A with an aluminum cable clamp do you have to take care of any effects due to Eddy currents and If so what can you do to minimise these effects.?

Answer . Assuming the single core cable forms part of a three phase circuit (i.e. you are clamping three single core cables) it is best to install the three cables close to

# Why would four core armoured cable be used in a single phase circuit?

Answer for USA, Canada and countries using similar 60Hz mains supplies . Four core armoured cable would be used in a circuit carrying 240 Volts 60 Hz AC that is installed i

# What size 3 core cable should you use for range cooker?

\n. \n. \nThe total amps required - if every burner is running full on high speed determines the wire size required. So all I can say here is if it is 50 amps max then a 6/3

# What is a single core cable?

A single core cable means it has one wire going through the outer casing.Like a 3 pin plug has 2 or 3 which are (blue)-Neutral,(Brown)-Live and maybe (Green/Yellow)-Earth whic

# Single core cables benefits?

One of the single core cables benefits is high current rating. Theother benefit is that the operating temperatures of single corecables are least affected by the other cables.

dont know mate

# What is the advantage of trefoil formation of HV power cable?

trefoil arrangements of same phase mimimise stray loss

# What is single core armored cable?

Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Unarmored electrical cable has no protective flexible steel coveri

# Recommended span between trefoil clamp?

usually 1m. generally depending on cable size

# Why single core cables are laid in trefoil formation?

Voltages are induced in the sheath of cables running in parallel which result in circulating currents flowing in the sheaths. The distances between single core cables running

# What single material is the core of baseball?

MLB (and most others) uses a rubber bouncy-ball like core.

# What is mean by laying of cables by trefoil formation.?

Seems to me a trefoil cable arrangement is related to bundling the hot, return (ground) and neutral wires in a triangular formation so to minimize the path resistance (respons
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# What type of clamp do you use installing armor cable?

what clamp require to install armor cable.

# What are the advantages Pvc Single Core Cables?

A single-core cable generally has a higher current rating becauseit can be separated from neighbouring cables to allow any heatgenerated to escape. However if power cables co

# How do you use trefoil in a sentence?

Common clovers have a trefoil shape. I'm going to need more practice tying this trefoil knot.

# Why trefoil formation for single core cable?

it is the way circles pack together next happy spot is 7 then 19

# What Are Multi-core Cables Used for?

Normally used in the communications industry these are a outersleeve with anything fron 1 to 100 smaller cables in their owncolour coded sleeves inside. An example around the