Release Dated: 25-JAN-87
						Last Revision 03/24/2020


This document explains, and is to be used in conjunction with, a CABLE INSTALLATION SCHEDULE.

The CABLE INSTALLATION SCHEDULE is supplied as another document in the total package of which this document is a part.

Note that this is a general document, and may contain much more information than may be required for the CABLE INSTALLATION SCHEDULE supplied. This is particularly true of the color code, cable types and cable termination tables which follow.

This document is divided into the following sections:

  1. Introduction
  2. General Notes
  4. Table 1 - Color Code Tables (and connection points) for Multi-Conductor Cables
  5. Table 2 - Cable Types and Cable Descriptions
  6. Table 3 - Cable Termination Descriptions
  7. Table 4 - Trim Codes for Coaxial Cable Terminations
  8. Table 5 - Document Revision Notes (for this document)

General Notes


1. Some definitions and descriptions may not be fully defined at the time that this listing was printed. Any such known areas will be noted by a sequence of 2 or more X's (i.e. 'termination type LFB-XX' or 'tooling XX-XXX'). Any such missing information will be completed as later listings are printed. Additional (and missing) information will also be included in later revisions, as that information is given to the keeper of this document.

Note: where information is missing, PLEASE ASK QUESTIONS.Where such information is added, it will be so specifically listed in the revision notes section (last pages) of all subsequent listings.

2. Block diagrams and other informational drawings have been supplied as a part of the total package. Those drawings are also to be used as references to aid in the understanding of the CABLE INSTALLATION SCHEDULE, and this document.

3. A large number of short and medium length cables will be furnished already cut and terminated, ready for final connection by the subcontractor.

4. All long-haul cables are to be cut and generally terminated by the subcontractor. For details refer to the specific cable-end assembly instructions, and the other drawings and documents supplied with the total package.

5. The cable installation schedules list the exact location (+/- 2 feet, sufficient to resolve any ambiguities) of the components to which each end of any given cable is to be connected. Station marks will be stenciled on the wall at 50 feet intervals in collider housings, and may be indicated by drawings for off-line components. Additional information on these station locations is given in the section entitled 'Cable Installation Schedule Format Description' below.

The subcontractor shall refer to these station marks as may be required in order to locate all components.


Terminal blocks are normally 50 point blocks. Each termination point has four flags -- A, B, C and D. Unless otherwise specifically noted, connect the indicated wire to flag 'C'.

The Cable Installation Schedule indicates the terminal block point numbers to be connected. The point numbers are called out at the right end of the 'ORIGIN' or 'DESTINATION' information field. For instance, -01/50, -26B50, -08C, etc., means to connect to points 1 through 50, the 'B' flag of points 26 through 50, and the 'C' flag of point 8, respectively. The points are wired in increasing numerical sequence, always starting with the first wire of the cable, per the indicated color code, to the lowest indicated number point. For the example given for 26B50, the first wire goes to point 26B, the second wire to point 27B, etc. If commas separate the numbers (for instance, -41,45B,43), rather than a slash, that means the first wire goes to point 41C, the second to point 45B and the third to point 43C.

The last two conductors of 52 conductor cables are generally not terminated. Also, some other cables are only partially wired. In all cases fold back and tape any unused conductors.

7. Termination Tooling.

It is IMPERATIVE that the correct tooling be used for: a. trimming coaxial and other special cable for termination, and

b. for crimping, or other assembly, of any termination to any wire or coax.

Much of the required tooling is specified further on in this specification. Should any required tooling not be specified, or if it is desired to use any tooling other than that explicitly specified, such tooling REQUIRES THE PRIOR APPROVAL OF THE DESIGNATED SLAC INSPECTOR.


8. Cables not rated as tray cables or as Halogen Free Low Smoke must have the approval of the Electrical Safety Officer (ESO) or the Electrical Safety Committee (ESC) prior to requests for installation. Requests for installation should specify any additional steps required; I.E additional support or fire blocking.

Cable Installation Schedule Format Description


The following is a description of the CABLE INSTALLATION SCHEDULE format:

FORMAL DEVICE NAME:This is the SLAC/SLC formal name for the system of which the indicated cable is a component. It is listed herein in order to allow quick reference to the actual control, readout, or other system as questions may occur. Example: QUAD:PI00,5920.

CABLE FUNCTION: This column gives a brief description of the function of the cable.

CABLE TYPE:This column gives the standard designation or an abbreviated form of it. Refer to TABLE 2 for the full and detailed description of any given cable.

CABLE NUMBER:This column lists the cable identification number, a number that is unique to a single cable installed at SLAC. This number must be affixed to each end of each cable. Pre-assembled cables will normally be provided with the correct cable numbers attached. Other labels will be provided to the subcontractor for attachment at the time of cable installation.

ORIGIN / LOCATION:This column refers to the location of the cable's origin. The distinction between 'ORIGIN' and 'DESTINATION' is of particular importance when installing pre-assembled cables, in that any excess cable, over that needed for a service loop at the 'ORIGIN' end, is to be stored/distributed at the 'DESTINATION' end of the installed cable. Most cables originate at one of the instrument racks in a support building or collider housing alcove. For instance;

B136-1714-J10/J13 is to be interpreted as follows:

B136 indicates Building 136 17 indicates rack 17, chassis elevation 14(location in the rack) J10/J13 indicates JACK NOS. 10 through 13 on the chassis.
Occasionally, after the chassis elevation and jack (terminal board, etc.), additional digits will appear. They will be explained in TABLE 3 under the cable termination description, or a separate wire list will be furnished.

Similarly AS15-04-0132-TB1-1B25 is to be interpreted as follows;

AS15 indicates Arc South, in the area of Achromat 15 (which spans about 170 feet) 04 indicates Alcove 4 (in the South Arc), 0132 indicates rack 01, elevation 32, (rack 01 is the first (leftmost facing the rack fronts) rack. TB1 indicates TERMINAL BLOCK NO. 1 1B25 indicates POINTS 1 through 25. The 'B' indicates that this is a FASTON terminal block, and means wire to the 'B' flags only, and in the same sequence as the color code for that wire type. See the tables in Section 3 for the color codes.

Note that the first characters of this field (to the first '-') will take a form similar to one of the following:

  1. B(nnn), indicating a Building number
  2. KAnn, indicating an Alcove in the Klystron Gallery area, where (nn) is the sector number
  3. KFnn, indicating a Fiat in the Klystron Gallery area, where (nn) is the sector number
  4. KGnn, indicating a Klystron Gallery area, where (nn) is the sector number
  5. KMnn, indicating a Mechanical Alcove in the Klystron Gallery area, where (nn) is the sector number
  6. LInn, indicating a LInac housing area, again where (nn) is the sector number
  7. DKG, indicating a Damping ring device in sector 01 of the Klystron Gallery
  8. N or S, followed by DRV, DR, RTL or LTR. This indicates a North or South Damping ring area, as follows:
DRV indicates that the location is on the wall or floor of the Damping Ring Vault, but NOT on a ring girder.
DR indicates a location actually on a Damping Ring girder
LTR is in the Linac-To-Ring (east) housing, and
RTL is in the Ring-To-Linac (west) housing.
Where LTR or RTL is followed by an S(n), the 'S' means that the location is on the wall or floor within that Section of the indicated housing.
Where LTR or RTL is followed by an (nn), the location is actually on a girder in the indicated housing, and the (nn) is the girder number.
  1. BSY indicates a location in the BEAM-SWITCHYARD (BSY) area.
  2. AN(nn) or AS(nn), indicating a location in the main Collider Arcs (North or South), the (nn) is the number of the Magnet Achromat (about 170 foot in length) spanning and/or including the exact location.
    If (nn) is '00', the location is prior to the first Achromat, in the launch portion of the indicated Arc, but actually inside the BSY housing area.

If (nn) is '24' or '25', the locations are in the Final Focus area of the indicated tunnel. (The last 32 feet of '25' on each side are actually in the Collider Pit.)

STATION: The exact location of a Beam Line related item is identified on the CABLE INSTALLATION SCHEDULE as a station number shown in feet, plus or minus 2 feet.

DESTINATION / LOCATION: This column is similar to 'ORIGIN' above, although many cables may find their destinations at a connection box or machine component on the actual Beam Line. Connection boxes and machine components are generally identified by the geographic area together with an abbreviated generic name. These components generally will be labeled, when they are in place at the time of the cable installation. Identification labels will probably not be found for devices not installed, and the LOCATION stations will be required to locate the given (future) connection point. INSTALLATION NOTES: (Two entries, one each for ORIGIN and DESTINATION.)

1. The first field (left character in the field) is a code which indicates when, and by whom, the indicated end of a cable is terminated and connected. Each end of a cable is given an assembly code, and each end may require entirely different treatment.

This code is specifically decoded for the subcontractor on the second line of this field (see 'c.' below). The codes used are as follows:

Andy Benwell 3/2/18 Some heliax cables in LLRF racks in sectors 0, and 1 must be cut to approximately the same mechanical length. The specification for these cable is that they are within 3 cm of each other in length. The absolute length does not matter. This specification also only exists within a single rack so that the matching length for one rack will be different than the matching length for the other racks. In order to achieve the length match requirement of cables that are already installed in conduit between the gallery and accelerator housing, the following steps should be performed sequentially for each rack. 1-) Terminate all length matched cables inside the LLRF rack. 2-) Terminate longest cable run in the accelerator housing for that rack's matched cables. 3-) Connect a Time Domain Reflectometer (TDR) in the rack and measure the length of the first fully terminated cable in the rack. 4-) Measure length of remaining length matched cables in the rack and cut the cable in the accelerator housing so that the length is within 3 cm of the first cable (6 cm for round trip electrical signal) 5-) Terminate each cable to this matched length All excess cable length should remain in the accelerator housing. This will ensure that as much cable as possible is in a temperature controlled environment.