BS 7671

API change history

Carryout calculations in accordance with BS 7671, including current carrying capacity of cables and earth fault loop impedance.

Current Capacity - Multi-core Cables Buried

Calculate the current capacity of multi-core cables buried in ground.

Try it

Request

Request URL

Request parameters

  • number

    Cable detail ID (cable needs to be compatible with BS 7671 sizing methods)

  • number

    Design current of a circuit, A

  • number

    Power factor (= 1 for d.c. circuits)

  • number

    Rated current setting of a protective device, A. Set to zero if no over-current device.

  • number

    Phase configuration: 0 - d.c., 1 - single phase a.c., 3 - three phase a.c., 4 - three pahse + neutral a.c.

  • number

    Secondary installation method ID

  • number

    Number of cables in parallel supplying a single circuit

  • number

    Number of independant cable circuits running together

  • number

    Spacing between independent cable circuits (see noCircuits), m

  • number

    Ambient temperature of the ground, °C

  • number

    Depth of buried cable, M

  • number

    Soil thermal resistivity of ground (cable are buried in), K.m/W

  • string

    Used to pass optional parameters to capacity API calls and will normally be set to '000000'. Bit 1 - set to 1 if BS 3036 fuse. Bit 2 to Bit 6, reserved for future use.

Request headers

  • string
    Subscription key which provides access to this API. Found in your Profile.

Request body

Code samples

@ECHO OFF

curl -v -X GET "https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}"
-H "Ocp-Apim-Subscription-Key: {subscription key}"

--data-ascii "{body}" 
using System;
using System.Net.Http.Headers;
using System.Text;
using System.Net.Http;
using System.Web;

namespace CSHttpClientSample
{
    static class Program
    {
        static void Main()
        {
            MakeRequest();
            Console.WriteLine("Hit ENTER to exit...");
            Console.ReadLine();
        }
        
        static async void MakeRequest()
        {
            var client = new HttpClient();
            var queryString = HttpUtility.ParseQueryString(string.Empty);

            // Request headers
            client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", "{subscription key}");

            var uri = "https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}?" + queryString;

            var response = await client.GetAsync(uri);
        }
    }
}	
// // This sample uses the Apache HTTP client from HTTP Components (http://hc.apache.org/httpcomponents-client-ga/)
import java.net.URI;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class JavaSample 
{
    public static void main(String[] args) 
    {
        HttpClient httpclient = HttpClients.createDefault();

        try
        {
            URIBuilder builder = new URIBuilder("https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}");


            URI uri = builder.build();
            HttpGet request = new HttpGet(uri);
            request.setHeader("Ocp-Apim-Subscription-Key", "{subscription key}");


            // Request body
            StringEntity reqEntity = new StringEntity("{body}");
            request.setEntity(reqEntity);

            HttpResponse response = httpclient.execute(request);
            HttpEntity entity = response.getEntity();

            if (entity != null) 
            {
                System.out.println(EntityUtils.toString(entity));
            }
        }
        catch (Exception e)
        {
            System.out.println(e.getMessage());
        }
    }
}

<!DOCTYPE html>
<html>
<head>
    <title>JSSample</title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
</head>
<body>

<script type="text/javascript">
    $(function() {
        var params = {
            // Request parameters
        };
      
        $.ajax({
            url: "https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}?" + $.param(params),
            beforeSend: function(xhrObj){
                // Request headers
                xhrObj.setRequestHeader("Ocp-Apim-Subscription-Key","{subscription key}");
            },
            type: "GET",
            // Request body
            data: "{body}",
        })
        .done(function(data) {
            alert("success");
        })
        .fail(function() {
            alert("error");
        });
    });
</script>
</body>
</html>
#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    
    NSString* path = @"https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}";
    NSArray* array = @[
                         // Request parameters
                         @"entities=true",
                      ];
    
    NSString* string = [array componentsJoinedByString:@"&"];
    path = [path stringByAppendingFormat:@"?%@", string];

    NSLog(@"%@", path);

    NSMutableURLRequest* _request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:path]];
    [_request setHTTPMethod:@"GET"];
    // Request headers
    [_request setValue:@"{subscription key}" forHTTPHeaderField:@"Ocp-Apim-Subscription-Key"];
    // Request body
    [_request setHTTPBody:[@"{body}" dataUsingEncoding:NSUTF8StringEncoding]];
    
    NSURLResponse *response = nil;
    NSError *error = nil;
    NSData* _connectionData = [NSURLConnection sendSynchronousRequest:_request returningResponse:&response error:&error];

    if (nil != error)
    {
        NSLog(@"Error: %@", error);
    }
    else
    {
        NSError* error = nil;
        NSMutableDictionary* json = nil;
        NSString* dataString = [[NSString alloc] initWithData:_connectionData encoding:NSUTF8StringEncoding];
        NSLog(@"%@", dataString);
        
        if (nil != _connectionData)
        {
            json = [NSJSONSerialization JSONObjectWithData:_connectionData options:NSJSONReadingMutableContainers error:&error];
        }
        
        if (error || !json)
        {
            NSLog(@"Could not parse loaded json with error:%@", error);
        }
        
        NSLog(@"%@", json);
        _connectionData = nil;
    }
    
    [pool drain];

    return 0;
}
<?php
// This sample uses the Apache HTTP client from HTTP Components (http://hc.apache.org/httpcomponents-client-ga/)
require_once 'HTTP/Request2.php';

$request = new Http_Request2('https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}');
$url = $request->getUrl();

$headers = array(
    // Request headers
    'Ocp-Apim-Subscription-Key' => '{subscription key}',
);

$request->setHeader($headers);

$parameters = array(
    // Request parameters
);

$url->setQueryVariables($parameters);

$request->setMethod(HTTP_Request2::METHOD_GET);

// Request body
$request->setBody("{body}");

try
{
    $response = $request->send();
    echo $response->getBody();
}
catch (HttpException $ex)
{
    echo $ex;
}

?>
########### Python 2.7 #############
import httplib, urllib, base64

headers = {
    # Request headers
    'Ocp-Apim-Subscription-Key': '{subscription key}',
}

params = urllib.urlencode({
})

try:
    conn = httplib.HTTPSConnection('mycableengineering.azure-api.net')
    conn.request("GET", "/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}?%s" % params, "{body}", headers)
    response = conn.getresponse()
    data = response.read()
    print(data)
    conn.close()
except Exception as e:
    print("[Errno {0}] {1}".format(e.errno, e.strerror))

####################################

########### Python 3.2 #############
import http.client, urllib.request, urllib.parse, urllib.error, base64

headers = {
    # Request headers
    'Ocp-Apim-Subscription-Key': '{subscription key}',
}

params = urllib.parse.urlencode({
})

try:
    conn = http.client.HTTPSConnection('mycableengineering.azure-api.net')
    conn.request("GET", "/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}?%s" % params, "{body}", headers)
    response = conn.getresponse()
    data = response.read()
    print(data)
    conn.close()
except Exception as e:
    print("[Errno {0}] {1}".format(e.errno, e.strerror))

####################################
require 'net/http'

uri = URI('https://mycableengineering.azure-api.net/bs7671/buried/multicore/{bs7671CableDetailID}/{Ib}/{pf}/{In}/{phase}/{secondaryMethodID}/{inParallel}/{noCircuits}/{circuitSpacing}/{groundTemperature}/{depth}/{soilThermalResistivity}/{flags_bs7671}')


request = Net::HTTP::Get.new(uri.request_uri)
# Request headers
request['Ocp-Apim-Subscription-Key'] = '{subscription key}'
# Request body
request.body = "{body}"

response = Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme == 'https') do |http|
    http.request(request)
end

puts response.body