Cable and Junction Box schedules are deliverables prepared by instrumentation and control design engineers in EPC or EPCM Companies. In this article, we shall learn about the same.
Below listed references are the required inputs for the preparation of the document “Cable Schedule”.
Cable Schedule is a document containing a list of Instrument cables. This document shows cable as well as gland required by each instrument or connection.
The information of the cable schedule consists:
Cable schedule is a reference in preparing Material Take-Off of cable for procurement. However, cable length shown on this document is approximate only. Therefore, there should be a contingency for material procurement to allow spare for cable cutting, unexpected barriers in the field, riser, etc.
Cable schedule will be referred also during the construction phase; however, it is not recommended to cut the cable based on the length information stated on the cable schedule. For actual cutting during installation, the common practice is to pull the cable from its drum and cut it in the field.
This is how a typical Cable schedule looks like.
First, let us learn about the Junction Box.
The junction box is an enclosure used for cables interconnection between field devices and the control room.
It encloses terminal strips for cable termination. Junction box shall be designed to suit environmental condition where the box will be installed and shall have certification of Ingress Protection code and hazardous area protection which conform to the classified area.
Junction Box consists of the following parts, but not limited to:
JB Schedule is a document containing a list of instrument JB. This document shows cable as well as gland required by each instrument or connection.
The information of the JB schedule consists:
JB schedule is a reference in preparing Material Take-Off of JBs for procurement.
JB schedule will be referred also during the construction phase, however, it is not recommended to install JBs based on the location information stated on the JB schedule. For actual installation, the common practice is to refer Location Layout.
Interest to add any further points? Share with us through below comments section.
Author: Kalpit Patel
VFD simulator download: Master the online tool from the Yaskawa V1000 & programming software for…
The conveyor sorting machine is widely used in the packing industries using the PLC program…
Learn the example of flip-flop PLC program for lamps application using the ladder logic to…
In this article, you will learn the STAR DELTA programming using PLC controller to start…
Lube oil consoles of rotary equipment packages in industrial process plants are usually equipped with…
Rotating equipment packages such as pumps, compressors, turbines need the lube oil consoles for their…